... stability.Sizefrom 3x6mm to 50x50mmShapesCylindrical,Cylindrical radius end;Conical,Tapered,Tree,Ball,CupBondingVitrified and resin-bondingHardnessM,O,H,I,T,L,N ... ,R,F,D,JGrit size30-220Structure Number1 - 14ColorRed,dark red, pink, green, grey, black,white etcGrain typesAO,SC,WA,GC,PA ...