{"product_id":"mirka-iridium-sr-1-25-in-psa-finishing-abrasive-discs-for-automotive-refinishing-24-340-3u","title":"Mirka Iridium SR 1.25-in. PSA Finishing Abrasive Discs for Automotive Refinishing (24-340-3U)","description":"\u003csection data-aplus\u003e\n  \u003cdetails id=\"product-features\" class=\"acc\" open\u003e\n    \u003csummary\u003e\u003ch2\u003eKey Features\u003c\/h2\u003e\u003c\/summary\u003e\n    \u003cdiv class=\"acc-body\"\u003e\n      \u003cdiv class=\"features\"\u003e\n        \u003cdiv class=\"card\"\u003e\n          \u003cdiv class=\"card-inside\"\u003e\n            \u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0933\/1582\/5958\/files\/sander.svg\" alt=\"sander\" class=\"aplusicon\"\u003e\n          \u003c\/div\u003e\n          \u003cdiv\u003e\u003cstrong\u003eFine Finish Control\u003c\/strong\u003e\u003c\/div\u003e\n          \u003cdiv class=\"feature-card\"\u003eThis Mirka Iridium SR 1.25\" diameter PSA abrasive disc is built for the final finishing stages where surface quality matters. It leaves a scratch pattern that is designed to polish out faster, which helps cut time before buffing.\u003c\/div\u003e\n        \u003c\/div\u003e\n        \u003cdiv class=\"card\"\u003e\n          \u003cdiv class=\"card-inside\"\u003e\n            \u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0933\/1582\/5958\/files\/material.svg\" alt=\"material\" class=\"aplusicon\"\u003e\n          \u003c\/div\u003e\n          \u003cdiv\u003e\u003cstrong\u003eSilicon Carbide Cut\u003c\/strong\u003e\u003c\/div\u003e\n          \u003cdiv class=\"feature-card\"\u003eEfficient silicon carbide grains keep the cut consistent on clearcoats, topcoats, and composites. That matters when you are trying to refine a surface without creating extra polishing work.\u003c\/div\u003e\n        \u003c\/div\u003e\n        \u003cdiv class=\"card\"\u003e\n          \u003cdiv class=\"card-inside\"\u003e\n            \u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0933\/1582\/5958\/files\/tool-free-change.svg\" alt=\"tool-free-change\" class=\"aplusicon\"\u003e\n          \u003c\/div\u003e\n          \u003cdiv\u003e\u003cstrong\u003eQuick PSA Changeover\u003c\/strong\u003e\u003c\/div\u003e\n          \u003cdiv class=\"feature-card\"\u003eThe pressure sensitive adhesive backing gives you a secure hold and fast disc swaps. For spot repair and small-area finishing, that means less downtime between steps.\u003c\/div\u003e\n        \u003c\/div\u003e\n      \u003c\/div\u003e\n    \u003c\/div\u003e\n  \u003c\/details\u003e\n\n  \u003cdetails id=\"product-overview\" class=\"acc\"\u003e\n    \u003csummary\u003e\u003ch2\u003eOverview\u003c\/h2\u003e\u003c\/summary\u003e\n    \u003cdiv class=\"acc-body\" data-product-summary\u003e\n      \u003cp\u003eThe \u003cstrong\u003eMirka Iridium SR 1.25\" diameter PSA abrasive disc\u003c\/strong\u003e, Model Number \u003cstrong\u003e24-340-3U\u003c\/strong\u003e, is a premium finishing abrasive made for automotive refinishing, collision repair, and transportation manufacturing work where surface quality is the whole game. This is a \u003cstrong\u003epremium abrasive disc designed for fine finishing and surface refinement\u003c\/strong\u003e. If you are cleaning up clearcoat, topcoat, or composite surfaces before polishing, this is the kind of disc made for that last stretch where mistakes show up fast.\u003c\/p\u003e\n      \u003cp\u003eWhat sets the Iridium SR line apart is how it focuses on the finish, not just material removal. Mirka calls out efficient silicon carbide grains and a slurry coating, and that combination is aimed at producing a scratch pattern that is easier and faster to polish out. In plain terms, it helps you get the surface where it needs to be without creating extra work later. That is a big deal in spot repair and refinishing, where the sanding step can either speed up the job or drag it out.\u003c\/p\u003e\n      \u003cp\u003eThe 1.25-inch diameter format is built for small-area work and controlled finishing in tight sections, edges, and repair zones where a larger abrasive is overkill. The PSA backing gives the disc a simple stick-on attachment, so it stays put during use and changes out quickly when it is time to move to the next step. For detail sanding and finishing on curved panels or isolated defects, that smaller disc size gives you better control than trying to force a larger disc into a precise repair area.\u003c\/p\u003e\n      \u003cp\u003eMirka also backs this abrasive with a stable, robust backing, which matters when you want the disc to perform consistently instead of loading up or getting unpredictable during fine work. In finishing applications, consistency is the difference between a clean repair and a surface that still needs more correction. That makes this abrasive disc a practical choice for users who care about repeatable results across painted panels, clearcoats, and composite parts.\u003c\/p\u003e\n      \u003cp\u003eAs part of the Mirka finishing system, the Mirka Iridium SR 1.25\" diameter PSA abrasive disc is intended for use with Mirka ergonomic cordless sanders including the Mirka AOS130-B and AROS150-B. That makes it a good fit for shops already running Mirka spot repair tools and looking for an abrasive that matches the tool's size and purpose. When the sander, backing pad, and abrasive are all built around fine-detail work, you get better control and a cleaner workflow.\u003c\/p\u003e\n      \u003cp\u003eWho should buy it? Auto body techs, paint correction pros, collision repair shops, and manufacturing users doing final finishing on painted or composite surfaces will get the most out of it. If your work is mostly heavy stock removal, this is not the disc for that. If your work is refining a surface so it is ready for the next finishing step, this is exactly the right lane.\u003c\/p\u003e\n    \u003c\/div\u003e\n  \u003c\/details\u003e\n\n  \u003cdetails id=\"product-benefits\" class=\"acc\"\u003e\n    \u003csummary\u003e\u003ch2\u003eBuilt for Small-Area Finishing\u003c\/h2\u003e\u003c\/summary\u003e\n    \u003cdiv class=\"acc-body\"\u003e\n      \u003cdiv class=\"row\"\u003e\n        \u003cdiv class=\"img\"\u003e\n          \u003cimg src=\"https:\/\/cdn.anglera.com\/assets\/74d6ed76-fe0d-4d23-a9db-1f8749ca9ef2\/20260623509_2.jpg\" alt=\"Mirka Iridium SR 1.25 inch diameter PSA abrasive disc used with a Mirka cordless detail sander on an automotive painted panel during spot finishing\" class=\"tnblock-img\"\u003e\n        \u003c\/div\u003e\n        \u003cdiv class=\"copy\"\u003e\n          \u003cp\u003eThe small 1.25-inch format gives you better control when the repair area is limited and the finish needs to stay clean. It is a smart choice for detail sanding on painted surfaces where precision matters more than coverage.\u003c\/p\u003e\n          \u003cul\u003e\n            \u003cli\u003e1.25-inch diameter suits spot repair and localized finishing\u003c\/li\u003e\n            \u003cli\u003eMade for the fine finishing stages of automotive refinishing and collision repair\u003c\/li\u003e\n          \u003c\/ul\u003e\n        \u003c\/div\u003e\n      \u003c\/div\u003e\n    \u003c\/div\u003e\n  \u003c\/details\u003e\n\n  \u003cdetails id=\"product-benefits-2\" class=\"acc flip\"\u003e\n    \u003csummary\u003e\u003ch2\u003eLeaves Less Work for Polishing\u003c\/h2\u003e\u003c\/summary\u003e\n    \u003cdiv class=\"acc-body\"\u003e\n      \u003cdiv class=\"row\"\u003e\n        \u003cdiv class=\"img\"\u003e\n          \u003cimg src=\"https:\/\/cdn.anglera.com\/assets\/74d6ed76-fe0d-4d23-a9db-1f8749ca9ef2\/20260623509_3.jpg\" alt=\"Mirka Iridium SR 1.25 inch diameter PSA abrasive disc refining an automotive clearcoat surface with a Mirka spot repair sander in a finishing workflow\" class=\"tnblock-img\"\u003e\n        \u003c\/div\u003e\n        \u003cdiv class=\"copy\"\u003e\n          \u003cp\u003eFine finishing abrasives are judged by what happens after sanding. Mirka designed this one with a slurry coating and silicon carbide grains to create a scratch pattern that is easier and faster to polish out.\u003c\/p\u003e\n          \u003cul\u003e\n            \u003cli\u003eEfficient silicon carbide grain supports consistent surface refinement\u003c\/li\u003e\n            \u003cli\u003eScratch pattern is designed for faster polish-out and quality consistency\u003c\/li\u003e\n          \u003c\/ul\u003e\n        \u003c\/div\u003e\n      \u003c\/div\u003e\n    \u003c\/div\u003e\n  \u003c\/details\u003e\n\n  \u003cdetails id=\"product-benefits-3\" class=\"acc\"\u003e\n    \u003csummary\u003e\u003ch2\u003eFast Disc Changes, Secure Hold\u003c\/h2\u003e\u003c\/summary\u003e\n    \u003cdiv class=\"acc-body\"\u003e\n      \u003cdiv class=\"row\"\u003e\n        \u003cdiv class=\"img\"\u003e\n          \u003cimg src=\"https:\/\/cdn.anglera.com\/assets\/74d6ed76-fe0d-4d23-a9db-1f8749ca9ef2\/20260623509_4.jpg\" alt=\"Mirka Iridium SR 1.25 inch diameter PSA abrasive disc being mounted onto a Mirka cordless sander backing pad for detail finishing work\" class=\"tnblock-img\"\u003e\n        \u003c\/div\u003e\n        \u003cdiv class=\"copy\"\u003e\n          \u003cp\u003ePSA backing keeps setup simple. When you are working through finishing steps or handling multiple spot repairs, quick changeover helps keep the job moving without fussing with the abrasive.\u003c\/p\u003e\n          \u003cul\u003e\n            \u003cli\u003ePressure sensitive adhesive backing mounts directly to the backing pad\u003c\/li\u003e\n            \u003cli\u003eWell suited for repetitive finishing steps in repair and production environments\u003c\/li\u003e\n          \u003c\/ul\u003e\n        \u003c\/div\u003e\n      \u003c\/div\u003e\n    \u003c\/div\u003e\n  \u003c\/details\u003e\n\n  \u003cdetails id=\"product-benefits-4\" class=\"acc flip\"\u003e\n    \u003csummary\u003e\u003ch2\u003eMade for Paint and Composite Work\u003c\/h2\u003e\u003c\/summary\u003e\n    \u003cdiv class=\"acc-body\"\u003e\n      \u003cdiv class=\"row\"\u003e\n        \u003cdiv class=\"img\"\u003e\n          \u003cimg src=\"https:\/\/cdn.anglera.com\/assets\/74d6ed76-fe0d-4d23-a9db-1f8749ca9ef2\/20260623509_5.jpg\" alt=\"Mirka Iridium SR 1.25 inch diameter PSA abrasive disc sanding a curved automotive panel during collision repair finishing\" class=\"tnblock-img\"\u003e\n        \u003c\/div\u003e\n        \u003cdiv class=\"copy\"\u003e\n          \u003cp\u003eThis abrasive disc is aimed at the surfaces that show every flaw: clearcoats, topcoats, and composites. That makes it a strong fit for collision repair, paint correction prep, and transportation manufacturing where finish consistency matters.\u003c\/p\u003e\n          \u003cul\u003e\n            \u003cli\u003eRecommended for clearcoats, topcoats, and composites processing\u003c\/li\u003e\n            \u003cli\u003eDesigned for automotive refinishing and transportation vehicle manufacturing\u003c\/li\u003e\n          \u003c\/ul\u003e\n        \u003c\/div\u003e\n      \u003c\/div\u003e\n    \u003c\/div\u003e\n  \u003c\/details\u003e\n\n  \u003cdetails id=\"product-key-specifications\" class=\"acc\" open\u003e\n    \u003csummary\u003e\u003ch2\u003eKey Specifications\u003c\/h2\u003e\u003c\/summary\u003e\n    \u003cdiv class=\"acc-body\"\u003e\n      \u003ctable class=\"aplusspecs\"\u003e\n        \u003ctr\u003e\n          \u003cth\u003eDiameter\u003c\/th\u003e\n          \u003ctd\u003e1.25 in\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n          \u003cth\u003eAttachment Type\u003c\/th\u003e\n          \u003ctd\u003ePressure Sensitive Adhesive (PSA)\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n          \u003cth\u003eAbrasive Material\u003c\/th\u003e\n          \u003ctd\u003eSilicon carbide\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n          \u003cth\u003eProduct Type\u003c\/th\u003e\n          \u003ctd\u003ePremium finishing abrasive disc\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n          \u003cth\u003ePrimary Applications\u003c\/th\u003e\n          \u003ctd\u003eClearcoats, topcoats, composites\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n          \u003cth\u003eModel Number\u003c\/th\u003e\n          \u003ctd\u003e24-340-3U\u003c\/td\u003e\n        \u003c\/tr\u003e\n      \u003c\/table\u003e\n    \u003c\/div\u003e\n  \u003c\/details\u003e\n\n  \u003cdetails id=\"product-compatibility\" class=\"acc\"\u003e\n    \u003csummary\u003e\u003ch2\u003eCompatibility\u003c\/h2\u003e\u003c\/summary\u003e\n    \u003cdiv class=\"acc-body\"\u003e\n      \u003cdiv class=\"compat-list\"\u003e\n        \u003cdiv class=\"compat-row\"\u003e\n          \u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0933\/1582\/5958\/files\/sander.svg\" alt=\"sander\" class=\"icon-sm\"\u003e\n          \u003cdiv\u003e\n            \u003cstrong\u003eMirka Sanders\u003c\/strong\u003e\n            \u003cdiv class=\"compat-detail\"\u003eUse with Mirka ergonomic cordless sanders including the Mirka AOS130-B and AROS150-B.\u003c\/div\u003e\n          \u003c\/div\u003e\n        \u003c\/div\u003e\n        \u003cdiv class=\"compat-row\"\u003e\n          \u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0933\/1582\/5958\/files\/size.svg\" alt=\"size\" class=\"icon-sm\"\u003e\n          \u003cdiv\u003e\n            \u003cstrong\u003eDisc Format\u003c\/strong\u003e\n            \u003cdiv class=\"compat-detail\"\u003eSized for 1.25-inch detail sanding applications where a small spot repair abrasive is required.\u003c\/div\u003e\n          \u003c\/div\u003e\n        \u003c\/div\u003e\n        \u003cdiv class=\"compat-row\"\u003e\n          \u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0933\/1582\/5958\/files\/material.svg\" alt=\"material\" class=\"icon-sm\"\u003e\n          \u003cdiv\u003e\n            \u003cstrong\u003eWork Surfaces\u003c\/strong\u003e\n            \u003cdiv class=\"compat-detail\"\u003eDesigned for sanding clearcoats, topcoats, and composite materials during fine finishing.\u003c\/div\u003e\n          \u003c\/div\u003e\n        \u003c\/div\u003e\n      \u003c\/div\u003e\n    \u003c\/div\u003e\n  \u003c\/details\u003e\n\n  \u003cdetails id=\"product-applications-uses\" class=\"acc\"\u003e\n    \u003csummary\u003e\u003ch2\u003eBuilt For\u003c\/h2\u003e\u003c\/summary\u003e\n    \u003cdiv class=\"acc-body\"\u003e\n      \u003cdiv class=\"tags\"\u003e\n        \u003cspan class=\"tag\"\u003eAutomotive Refinishing\u003c\/span\u003e\n        \u003cspan class=\"tag\"\u003eCollision Repair\u003c\/span\u003e\n        \u003cspan class=\"tag\"\u003eTransportation Manufacturing\u003c\/span\u003e\n        \u003cspan class=\"tag\"\u003eClearcoat Finishing\u003c\/span\u003e\n        \u003cspan class=\"tag\"\u003eTopcoat Refinement\u003c\/span\u003e\n        \u003cspan class=\"tag\"\u003eComposite Processing\u003c\/span\u003e\n        \u003cspan class=\"tag\"\u003eSpot Repair\u003c\/span\u003e\n        \u003cspan class=\"tag\"\u003eDetail Sanding\u003c\/span\u003e\n      \u003c\/div\u003e\n    \u003c\/div\u003e\n  \u003c\/details\u003e\n\n  \u003cdetails id=\"product-pro-tips\" class=\"acc\"\u003e\n    \u003csummary\u003e\u003ch2\u003ePro Tip\u003c\/h2\u003e\u003c\/summary\u003e\n    \u003cdiv class=\"acc-body\"\u003e\n      \u003cdiv class=\"tip-row\"\u003e\n        \u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0933\/1582\/5958\/files\/specs.svg\" alt=\"specs\" class=\"icon-lg\"\u003e\n        \u003cp class=\"tip-text\"\u003eUse the Mirka Iridium SR 1.25\" diameter PSA abrasive disc for the final refinement step on isolated defects and small repair zones, not broad-area sanding. That is where the small diameter and fast-polishing scratch pattern really pay off.\u003c\/p\u003e\n      \u003c\/div\u003e\n    \u003c\/div\u003e\n  \u003c\/details\u003e\n\n  \u003cdetails id=\"product-tool-nut-take\" class=\"acc\"\u003e\n    \u003csummary\u003e\u003ch2\u003eTool Nut's Take\u003c\/h2\u003e\u003c\/summary\u003e\n    \u003cdiv class=\"acc-body\"\u003e\n      \u003cdiv class=\"eyebrow\"\u003eTool Nut's Take\u003c\/div\u003e\n      \u003ch3\u003eMirka Iridium SR 1.25\" Diameter PSA Abrasive Disc for Finish Work That Actually Needs to Look Right\u003c\/h3\u003e\n      \u003cp\u003eThis is a smart pick for detail finishing because it is built to refine the surface cleanly and keep polishing time under control.\u003c\/p\u003e\n      \u003cul\u003e\n        \u003cli\u003e\n\u003cstrong\u003eWho it's for:\u003c\/strong\u003e Auto body techs, collision repair shops, and finishing pros doing spot repair, clearcoat refinement, or composite finishing.\u003c\/li\u003e\n        \u003cli\u003e\n\u003cstrong\u003eWhy it stands out:\u003c\/strong\u003e The small 1.25-inch size gives you control, while the silicon carbide and slurry-coated design are aimed at a scratch pattern that is easier to polish out.\u003c\/li\u003e\n        \u003cli\u003e\n\u003cstrong\u003eWorth knowing:\u003c\/strong\u003e This is a finishing abrasive disc, not a heavy removal product. If your goal is final surface quality, it makes sense. If you still need to level material aggressively, start earlier in the process.\u003c\/li\u003e\n      \u003c\/ul\u003e\n    \u003c\/div\u003e\n  \u003c\/details\u003e\n\n  \u003cdetails id=\"product-faqs\" class=\"acc\"\u003e\n    \u003csummary\u003e\u003ch2\u003eCommon Questions\u003c\/h2\u003e\u003c\/summary\u003e\n    \u003cdiv class=\"acc-body\"\u003e\n      \u003cul\u003e\n        \u003cli\u003e\n\u003cstrong\u003eWhat is this product used for?\u003c\/strong\u003e It is used for the finest finishing stages in automotive refinishing, collision repair, and transportation vehicle manufacturing.\u003c\/li\u003e\n        \u003cli\u003e\n\u003cstrong\u003eWhat materials is it designed to sand?\u003c\/strong\u003e It is designed for clearcoats, topcoats, and composites processing.\u003c\/li\u003e\n        \u003cli\u003e\n\u003cstrong\u003eWhat type of backing does it use?\u003c\/strong\u003e It uses a pressure sensitive adhesive, or PSA, backing for direct attachment to the backing pad.\u003c\/li\u003e\n        \u003cli\u003e\n\u003cstrong\u003eWhich Mirka sanders is it intended to work with?\u003c\/strong\u003e Mirka lists the cordless AOS130-B and AROS150-B as compatible tools for this abrasive disc.\u003c\/li\u003e\n      \u003c\/ul\u003e\n    \u003c\/div\u003e\n  \u003c\/details\u003e\n\u003c\/section\u003e","brand":"Mirka","offers":[{"title":"Default Title","offer_id":53385923985702,"sku":"24-340-3U-MIRKA","price":216.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0933\/1582\/5958\/files\/20260623509_1.jpg?v=1782171925","url":"https:\/\/www.toolnut.com\/products\/mirka-iridium-sr-1-25-in-psa-finishing-abrasive-discs-for-automotive-refinishing-24-340-3u","provider":"Tool Nut","version":"1.0","type":"link"}