... 230mm Grit:40#~400# best quality Fiber discmaterial:aluminum oxideDiameter:100mm,115mm,125mm,150mm,180mm,230mmGrit:40#~ ... use on steel, stainless steel, metal, NF metals, wood, plastic, marble and cast iron. Use these discs, ... Size in mmInchAvailable gritsAbrasiveApplicationBacking thicknessCoatingBonding agentDesign100x164 40#--400# Aluminum Oxide.Wood, PlasticMetal, NF metal 0.65mm0.80mm1.00mm1.80mm2 ...