{"product_id":"mirka-novastar-flex-5-1-in-x-6-7-in-400-grit-hand-sanding-sheet-with-grip-backing-perforated-fx-191-400","title":"Mirka Novastar Flex 5.1-in. x 6.7-in. 400 Grit Hand Sanding Sheet with Grip Backing, Perforated (FX-191-400)","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\/anti-vibration.svg\" alt=\"anti-vibration\" class=\"aplusicon\"\u003e\n          \u003c\/div\u003e\n          \u003cdiv\u003e\u003cstrong\u003eFlexes Around Curves\u003c\/strong\u003e\u003c\/div\u003e\n          \u003cdiv class=\"feature-card\"\u003eThis Mirka hand sanding sheet is built for shapes and complex contours where stiffer sheets fight you. It bends without wrinkling or breaking, so you keep even contact and a more consistent finish.\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\/grit-range.svg\" alt=\"grit-range\" class=\"aplusicon\"\u003e\n          \u003c\/div\u003e\n          \u003cdiv\u003e\u003cstrong\u003eBalanced Cut and Finish\u003c\/strong\u003e\u003c\/div\u003e\n          \u003cdiv class=\"feature-card\"\u003eThe 400 grit gives a useful middle-ground scratch pattern for refinement work. You get material removal without jumping straight to an overly fine sanding step.\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\/toolbox.svg\" alt=\"toolbox\" class=\"aplusicon\"\u003e\n          \u003c\/div\u003e\n          \u003cdiv\u003e\u003cstrong\u003eWorks Full or Half Sheet\u003c\/strong\u003e\u003c\/div\u003e\n          \u003cdiv class=\"feature-card\"\u003eA center perforation lets you tear the sheet in half when the job gets tighter or you want less waste. Both full and half sheets can be used with or without a hand pad.\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 Mirka NOVASTAR FLEX 5.1\" x 6.7\" Grip Perf. is an ultra-flexible hand sanding sheet for dry sanding, built for users who need clean, controlled sanding on curves, edges, and complex shapes. This is a hand sanding sheet designed for dry sanding on shaped surfaces and contour work. Model Number: FX-191-400. In this version, the sheet comes in 400 grit, which makes it a practical choice when you need a balanced cut and scratch pattern instead of a too-aggressive or too-fine step.\u003c\/p\u003e\n      \u003cp\u003eWhat matters here is how the sheet behaves when the surface stops being flat. Mirka states the abrasive surface does not wrinkle or break, and that there are no sharp edges even when folded. On the job, that means the sheet stays usable when you need to wrap it around a body line, reach into a recessed area, or feather a transition without the abrasive fighting back. That kind of flexibility is what separates a purpose-built sanding sheet from a standard sheet that works fine on a flat block but falls apart on real contour work.\u003c\/p\u003e\n      \u003cp\u003eThe 5.1 inch by 6.7 inch format, also listed as 130 x 170 mm, gives you enough surface area for efficient hand sanding while still being easy to control. The grip backing adds another practical advantage for users who prefer a hand pad, but Mirka also notes the full and half sheets can be used with or without one. That gives you options depending on the surface and how much feel you want in your hand. For flatter areas, a hand pad helps maintain consistency. For tighter areas and transitions, going directly by hand gives you more control.\u003c\/p\u003e\n      \u003cp\u003eOne of the smarter details on this Mirka sanding abrasive is the center perforation. Instead of burning through a full sheet on smaller work, you can tear it in half and keep moving. That is useful in automotive refinishing and detail prep where you are often chasing small sections, narrow contours, or localized repair areas. Less wasted abrasive and better sizing for the task usually means better efficiency at the bench and in the booth prep area.\u003c\/p\u003e\n      \u003cp\u003eMirka also calls out easy cleaning and long life, which matters because hand sanding sheets that load up quickly cost time and consistency. A sheet that stays cleaner works more predictably through the sanding step and helps maintain the finish quality you are trying to achieve. Combined with the stated balance in cutting action and scratch pattern, this points to a sheet made for finish-sensitive work where surface quality matters, not just raw stock removal.\u003c\/p\u003e\n      \u003cp\u003eThis Mirka NOVASTAR FLEX 5.1\" x 6.7\" Grip Perf. is a strong fit for automotive refinishing, bodywork prep, detail sanding, and any hand sanding job where shapes, radiuses, and hard-to-reach contours are part of the work. If you spend most of your time on flat panels with a block, you can use it there too, but its real value shows up when the panel shape gets complicated. For painters, body techs, detail refinishers, and serious DIY users who want a flexible dry sanding sheet that keeps its shape and finish quality, this is the kind of abrasive that earns its spot fast.\u003c\/p\u003e\n    \u003c\/div\u003e\n  \u003c\/details\u003e\n\n  \u003cdetails id=\"product-benefits-1\" class=\"acc\"\u003e\n    \u003csummary\u003e\u003ch2\u003eMirka NOVASTAR FLEX 5.1\" x 6.7\" Grip Perf. Handles Contours Better\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\/20260623490_3.jpg\" alt=\"Mirka NOVASTAR FLEX 5.1 x 6.7 Grip Perf hand sanding sheet bending over a contoured automotive panel during dry sanding work\" class=\"tnblock-img\"\u003e\n        \u003c\/div\u003e\n        \u003cdiv class=\"copy\"\u003e\n          \u003cp\u003eWhen you are sanding a shaped panel, flexibility is not a bonus feature. It is the whole game. This sheet is built to follow changing curves so you can keep the abrasive where you need it instead of digging into high spots.\u003c\/p\u003e\n          \u003cul\u003e\n            \u003cli\u003eUltra-flexible sheet for shapes and complex contours\u003c\/li\u003e\n            \u003cli\u003eAbrasive surface is designed not to wrinkle or break during use\u003c\/li\u003e\n            \u003cli\u003eNo sharp edges even when folded for tighter access\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\u003eUse Less Sheet on Small Repairs\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\/20260623490_4.jpg\" alt=\"Mirka NOVASTAR FLEX hand sanding sheet folded for dry sanding along a narrow lower vehicle panel edge\" class=\"tnblock-img\"\u003e\n        \u003c\/div\u003e\n        \u003cdiv class=\"copy\"\u003e\n          \u003cp\u003eThe center perforation is one of those small details that saves time and abrasive. Tear the sheet in half when the repair is small or the area is tight, and keep the full sheet for broader hand work.\u003c\/p\u003e\n          \u003cul\u003e\n            \u003cli\u003eCenter perforation allows quick tear-down into half sheets\u003c\/li\u003e\n            \u003cli\u003eFull and half sheets can be used with or without a hand pad\u003c\/li\u003e\n            \u003cli\u003eBetter control on narrow sections, edges, and recessed areas\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\u003eBuilt for Finish-Sensitive Dry Sanding\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\/20260623490_5.jpg\" alt=\"Mirka NOVASTAR FLEX flexible sanding sheet used by hand on a glossy black automotive body panel for dry finish sanding\" class=\"tnblock-img\"\u003e\n        \u003c\/div\u003e\n        \u003cdiv class=\"copy\"\u003e\n          \u003cp\u003eThis 400 grit version is aimed at users who need a controlled scratch pattern and a useful rate of cut. It is a good fit when surface quality matters just as much as getting through the sanding step efficiently.\u003c\/p\u003e\n          \u003cul\u003e\n            \u003cli\u003e400 grit for balanced cut and scratch pattern\u003c\/li\u003e\n            \u003cli\u003eDesigned for dry sanding applications\u003c\/li\u003e\n            \u003cli\u003eEasy-to-clean sheets are made for long service life\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\u003eSimple Format, Shop-Friendly Workflow\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\/20260623490_1.jpg\" alt=\"Mirka NOVASTAR FLEX sanding sheets in multiple color-coded grit options for dry sanding and surface preparation\" class=\"tnblock-img\"\u003e\n        \u003c\/div\u003e\n        \u003cdiv class=\"copy\"\u003e\n          \u003cp\u003eMirka includes color-coded grits in the NOVASTAR FLEX line, which makes it easier to grab the right sheet fast during prep. That sounds minor until you are moving between sanding steps and trying to keep the workflow clean.\u003c\/p\u003e\n          \u003cul\u003e\n            \u003cli\u003eSheet size: 5.1 in x 6.7 in or 130 x 170 mm\u003c\/li\u003e\n            \u003cli\u003eGrip backing supports hand pad use when needed\u003c\/li\u003e\n            \u003cli\u003eColor-coded grit system helps reduce mix-ups between sanding stages\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\u003eSize\u003c\/th\u003e\n          \u003ctd\u003e5.1 in x 6.7 in\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n          \u003cth\u003eMetric Size\u003c\/th\u003e\n          \u003ctd\u003e130 x 170 mm\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n          \u003cth\u003eGrit\u003c\/th\u003e\n          \u003ctd\u003e400\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n          \u003cth\u003eSanding Type\u003c\/th\u003e\n          \u003ctd\u003eDry sanding\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n          \u003cth\u003eBacking\u003c\/th\u003e\n          \u003ctd\u003eGrip backing\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n          \u003cth\u003ePerforation\u003c\/th\u003e\n          \u003ctd\u003eCenter perforation\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n          \u003cth\u003eSheet Format\u003c\/th\u003e\n          \u003ctd\u003eFull sheet or half sheet use\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n          \u003cth\u003eApplication\u003c\/th\u003e\n          \u003ctd\u003eHand sanding on shapes and complex contours\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\/handle.svg\" alt=\"handle\" class=\"icon-sm\"\u003e\n          \u003cdiv\u003e\n            \u003cstrong\u003eHand Pad Use\u003c\/strong\u003e\n            \u003cdiv class=\"compat-detail\"\u003eBoth full sheets and half sheets can be used with a hand pad.\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\/hand.svg\" alt=\"specs\" class=\"icon-sm\"\u003e\n          \u003cdiv\u003e\n            \u003cstrong\u003eDirect Hand Use\u003c\/strong\u003e\n            \u003cdiv class=\"compat-detail\"\u003eThe sheet can also be used without a hand pad when you need more feel on contours and detail areas.\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\u003c\/span\u003e\n        \u003cspan class=\"tag\"\u003eBodywork\u003c\/span\u003e\n        \u003cspan class=\"tag\"\u003eDry Sanding\u003c\/span\u003e\n        \u003cspan class=\"tag\"\u003eContour Sanding\u003c\/span\u003e\n        \u003cspan class=\"tag\"\u003eSurface Preparation\u003c\/span\u003e\n        \u003cspan class=\"tag\"\u003eRefinishing\u003c\/span\u003e\n        \u003cspan class=\"tag\"\u003eDetail Sanding\u003c\/span\u003e\n        \u003cspan class=\"tag\"\u003eDIY \/ Hobbyist\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 center perforation before you start a small repair instead of folding a full sheet into a bulky pad. You will get better control in tight spots and waste less abrasive on detail work.\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\u003eA Smart Pick for Curves, Edges, and Finish Work\u003c\/h3\u003e\n      \u003cp\u003eThe Mirka NOVASTAR FLEX 5.1\" x 6.7\" Grip Perf. earns its keep when flat sanding turns into real-world sanding and the panel shape starts fighting back.\u003c\/p\u003e\n      \u003cul\u003e\n        \u003cli\u003e\n\u003cstrong\u003eWho it's for:\u003c\/strong\u003e Automotive refinishers, body techs, and detail-focused users doing dry sanding on contoured surfaces.\u003c\/li\u003e\n        \u003cli\u003e\n\u003cstrong\u003eWhy it stands out:\u003c\/strong\u003e The flexibility, fold-friendly design, and center perforation make it more useful than a basic hand sheet when the work gets tight or curved.\u003c\/li\u003e\n        \u003cli\u003e\n\u003cstrong\u003eWorth knowing:\u003c\/strong\u003e This listing is specifically the 400 grit version, so make sure that sanding step fits your process before you buy.\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 type of sanding is this sheet designed for?\u003c\/strong\u003e It is designed for dry sanding.\u003c\/li\u003e\n        \u003cli\u003e\n\u003cstrong\u003eCan it be used on curved or complex shapes?\u003c\/strong\u003e Yes. Mirka states it is made to tackle shapes and complex contours, and the abrasive surface is designed not to wrinkle or break.\u003c\/li\u003e\n        \u003cli\u003e\n\u003cstrong\u003eCan the sheet be torn into a smaller size?\u003c\/strong\u003e Yes. It has a center perforation for tearing in half.\u003c\/li\u003e\n        \u003cli\u003e\n\u003cstrong\u003eDoes it need a hand pad?\u003c\/strong\u003e No. Full and half sheets can be used with or without a hand pad.\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":53385923559718,"sku":"FX-191-400-MIRKA","price":52.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0933\/1582\/5958\/files\/20260623490_1.jpg?v=1782171922","url":"https:\/\/www.toolnut.com\/products\/mirka-novastar-flex-5-1-in-x-6-7-in-400-grit-hand-sanding-sheet-with-grip-backing-perforated-fx-191-400","provider":"Tool Nut","version":"1.0","type":"link"}