Mirka IRIDIUM 5" PSA is a premium paper abrasive disc for sanding and surface preparation. This is a 5-inch PSA sanding disc designed for fast stock removal and general sanding on soft and hard surfaces. For this variant, the model number is 24-314-080, which corresponds to 80 grit. If you are doing bodywork, paint prep, woodworking, or general finish removal, this is the kind of abrasive that makes the first sanding step go quicker.

What matters here is not just that it is 80 grit, but how it is built. Mirka uses a blend of ceramic and aluminum oxide grains, which gives the disc a strong initial bite and helps it keep cutting as the job goes on. On rough prep work, that means less time leaning on the sander and fewer early disc changes when you are trying to knock down material efficiently.

The flexible paper backing is a big part of why the Iridium line works across different materials and tasks. A stiff abrasive can feel fine on a flat panel but become less forgiving as soon as the surface changes. A more flexible backing helps the disc stay useful across broader sanding work, especially when you move between surface leveling, edge work, and prep before finer grits.

Mirka also calls out a precision coating that helps prevent clogging and reduce pilling. In plain terms, that matters because loaded paper stops cutting and starts wasting motion. An abrasive that resists buildup stays productive longer, especially when sanding coatings, fillers, or mixed surfaces where dust can pack the face of the disc fast.

Because this is a PSA disc, it is intended for sanding setups that use pressure-sensitive adhesive attachment rather than hook-and-loop. That gives you a firm, flat hold on the pad, which is useful when you want a consistent scratch pattern and solid contact during aggressive sanding passes. Just make sure your backing pad is set up for PSA discs before you order.

The 5-inch, or 125 mm, size is a common format for finishing and prep sanders, so this disc fits right into a lot of everyday shop and jobsite sanding routines. It is a good choice for pros who burn through abrasives regularly and want a paper abrasive that cuts fast, stays usable, and works across multiple materials instead of being limited to one narrow task.

If you are the buyer who cares more about how quickly an abrasive cuts, how long it stays useful, and how cleanly it works through surface prep than about flashy packaging, this is the right kind of product. The Mirka IRIDIUM 5" PSA makes the most sense for body shops, cabinet shops, finish prep, and anyone who needs a dependable sanding disc for repeatable material removal.

Mirka IRIDIUM 5" PSA Is the Kind of Abrasive That Earns Its Spot

If you want an 80 grit sanding disc that cuts hard, stays useful, and fits PSA sanding workflows, this is an easy one to like.

• Who it's for: Pros and serious DIY users doing bodywork, wood prep, coating removal, and general sanding where fast stock removal matters.
• Why it stands out: The ceramic and aluminum oxide grain blend, flexible paper backing, and anti-clogging coating give it more real-world value than bargain paper that quits early.
• Worth knowing: Make sure your machine uses PSA discs. If your sander is set up for hook-and-loop, this is the wrong attachment style.

• What size is this disc? This variant is a 5 inch, or 125 mm, abrasive disc.
• What grit is SKU 24-314-080? It is 80 grit.
• Is this a hook-and-loop sanding disc? No. It uses PSA, which stands for pressure-sensitive adhesive attachment.
• What materials is it intended for? Mirka describes Iridium as a universal sanding abrasive for both soft and hard surfaces.