FITS SURFPREP, UNEEDA, & MIRKA - Serious Grit 3" x 4" 6-Hole 10mm foam hook & loop sanding pads are compatible with the Surfprep 3x4 Electric Ray, Surfprep Storm, Uneeda Ekasand, Mirka DEOS 343, and any other 3" x 4" hook and loop detail sander. MADE IN USA - we're proud to manufacture our 3x4 foam sanding pads in the USA, supporting American jobs and small businesses. FAST-CUTTING SILICON CARBIDE GRAIN - compared with aluminum oxide, silicon carbide grain is sharper and harder, producing faster cut rates, less sanding time, and better finish quality. 10mm MEDIUM DENSITY FOAM - the medium density 10mm thick open cell polyurethane foam is excellent for flat sanding yet flexible enough to avoid burn-through. Perfect for shaker doors and light hand sanding edges on cabinetry, furniture, and painted surfaces. WET/DRY COMPATIBLE - These sanding sponges are wet/dry compatible and ideal for sanding all surfaces, including bare wood, latex or oil paint, stained wood, autobody, metal, epoxy, gelcoat, plaster, etc. Rinse, reuse, and keep working! Serious Grit 3x4 P220–240 grit foam sanding pads are optimized for fine finish sanding before painting or staining. The medium-density 10mm foam delivers even pressure across curved and flat surfaces, reducing the risk of burn-through. The silicon carbide abrasive produces a smooth, consistent scratch that’s easy to hide under finish. Use dry or with water for reduced clogging. Hook & loop design fits SurfPrep, Uneeda, and Mirka 3x4 electric sanders.