Cleaning Sanding blocks • Premium abrasive grain on a soft, foam backing • Foam backing provides ultimate conformability and is washable for long life • For use on wood moldings, metal contours, drywall sanding,and paint removal applications, hardwoods and softwoods, plastic, paint,fiberglass, auto body filler, and drywall compounds, Ferrous and non-ferrous metals. •Material:aluminum oxide,silicon carbide with low density,middle density,high density foam •Grit:40# 60# 80# 100# 120# 150# 180# 220# 240# 320# 400# available:100*70*25mm,115*140*5mm,125*100*12mm,125*100*10mm,125*90*25mm ,we can make any size as you required