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 P280–380 grit foam sanding pads are designed for ultra-smooth between-coat sanding. These very fine pads feature a flexible 10mm foam interface that adapts to trim, profiles, and curves while preventing swirl marks. The premium silicon carbide abrasive cuts evenly across clear coats, primer, and paint. Hook & loop backing ensures secure fitment on SurfPrep and other 3x4 sanders. Works wet or dry to extend pad life and improve finish quality.