FITS SURFPREP, UNEEDA, & MIRKA - Serious Grit 3" x 4" 6-Hole 5mm 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. 5mm HIGH DENSITY FOAM - Designed for precision flat sanding, the 5mm thick open cell foam pad delivers consistent pressure for a smooth, even finish. Its rectangular shape reaches into square corners and tight spaces where orbital sanders fall short - making it a must-have for flawless prep work. 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 foam sanding pads are built for flat surface sanding with SurfPrep, Uneeda Ekasand, and Mirka 3x4 power sanders. These pads feature a 5mm high-density foam that maintains a firm, consistent sanding surface with just enough flexibility to follow slight variations without rounding over edges. Ideal for final sanding before paint or stain on cabinetry and doors, the premium silicon carbide abrasive cuts fast and leaves a clean, even scratch pattern on wood, primer, and painted finishes. The hook & loop backing ensures quick pad changes, and the durable construction supports both wet and dry sanding.