Name:abrasives sponge block Type:ABRH-018 Mode:Materials: aluminium oxide or silicon carbide resin over resin sponge applications: it is flexible and soft , it is ideal for dry or wet grinding and can be reusable after washing . it is used for special surfaces of metal .paint ,wood plastic by hand, it is high efficient for fine grit. girt : 24#-600# size:100x70x25mm 125x100x10mm 140x114x5mm