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 P150–180 grit foam sanding pads are built for smoothing surfaces after initial leveling. The medium-density 10mm foam layer cushions your sander, allowing it to follow profiles and edges without gouging. A high-performance silicon carbide abrasive ensures clean, uniform scratch patterns on bare wood or primed surfaces. Hook & loop backing provides secure attachment and fast changes. Compatible with SurfPrep, Uneeda, and Mirka 3x4 sanders. Wet or dry use.