Material:A ---Aluminium, C ----Silicon Carbide Applications:Wood, Paint/Varnish Filler,Plastic Grains: coarse/medium/fine ... ,wood,plastic by hand.It is high efficient for fine grit.Usual size as following:100x70x25mm,125x100x12mm,125x90x25mm,140x115x5mm,125x70x20mm,100x70x12mmGrits ...