3M's highest performance fibre disc range designed for optimum results Precision shaped uniformly sized and vertically orientated ceramic grain with a grinding aid provides engineered stock removal capabilities 987C is the complete stainless steel solution Bore size 16 mm Description, Product 3M Cubitron II Fibre Disc 987C 100mm 60+ Diameter, blade/disc 100 mm Grit size P60 RoHS Compliant NA