Mirka Q.Silver 6-in. 400 Grit PSA Sanding Disc Pack for Surface Finishing (2B-342-400)

The Mirka 2B-342-400 Q.Silver 6 Inch PSA Linkroll Sanding Disc 400 Grit is a roll-form abrasive disc pack built for finish sanding and surface preparation across automotive, marine, wood, and composite work. This is a sanding disc designed for fine surface prep and controlled material removal. Model Number: 2B-342-400. If you need a 6 inch PSA sanding disc that sticks securely, cuts consistently, and comes in a high-count box for production work, this one is aimed right at that kind of use.

What matters here is the combination of grit, backing, and abrasive construction. The 400 grit rating puts this disc in the fine-sanding range, which makes it a practical choice when you’re refining a surface rather than trying to strip it aggressively. According to the source data, Mirka’s Q.Silver abrasive uses a flexible and durable latex paper backing with a full resin bond. In real use, that means the disc is built to stay useful when heat builds up and when the work calls for a steady, even scratch pattern.

Mirka also positions this abrasive for demanding sanding tasks, including down-to-metal work, which tells you the abrasive is meant to hold up under tougher conditions than a bargain disc. The latex paper backing adds flexibility, which helps the disc conform better during hand-guided machine sanding and reduces the stiff, grabby feel you can get from lower-grade paper-backed abrasives. That kind of flexibility matters when you’re working curves, body panels, edges, or shaped wood parts and you want more control.

The PSA format is another practical advantage. Pressure-sensitive adhesive discs are straightforward: peel, stick, sand, replace. That makes this Mirka sanding disc a good fit for users who want a secure hold on a 6 inch backing pad without dealing with hook and loop wear or inconsistent attachment. In a shop setting, that can mean cleaner disc tracking and fewer interruptions once the disc is mounted correctly.

This product is sold as a 100-count pack, which makes more sense for busy users than buying small sleeves one at a time. If you’re running through discs in an auto body shop, marine repair bay, cabinet shop, or composite fabrication setup, having a box of the same grit on hand keeps your sanding sequence consistent and saves time during repeat jobs.

Who should buy it? This is a smart pick for automotive refinishing, marine work, composite processing, woodworking, and vehicle manufacturing applications where finish quality matters and consistent abrasive performance is worth paying for. If you already use a 6 inch PSA sander or matching backup pad and you need fine-grit discs from a proven abrasive brand, the Mirka 2B-342-400 Q.Silver 6 Inch PSA Linkroll Sanding Disc 400 Grit is the kind of stock item that earns its shelf space.

Mirka 2B-342-400 Q.Silver 6 Inch PSA Linkroll Sanding Disc 400 Grit Gets the Job Done Without Feeling Cheap

This is the kind of abrasive you buy when you care more about a clean, repeatable finish than saving a few bucks on discs that quit early.

• Who it’s for: Shops and serious users doing automotive refinishing, marine repair, composites, or woodworking with a 6 inch PSA sander.
• Why it stands out: The Q.Silver abrasive, latex paper backing, and resin bond give it the durability and flexibility you want for real finishing work.
• Worth knowing: This is a 400 grit disc, so it is meant for finer sanding steps, not fast heavy stock removal.

• What size are these sanding discs? These discs are 6 inches in diameter.
• What attachment style do they use? They use PSA, which stands for pressure-sensitive adhesive.
• What grit is this pack? This pack is 400 grit.
• How many discs come in the box? The pack quantity is 100 discs.