Atoplee 10pcs 4'' 100mm Wool Polishing Buffing Wheel Pad Bore Dia Diameter :100mm Bore Diameter :16mm(for 100 angle grinder used) Thickness:8mm Material:White Wool(Buff) Color: black, white,green(random delivery) Used for:copper, iron and aluminum and other metal products, stainless  steel ceramic glass furniture polished marble stone and other highly  refined use! Diameter:100mm Bore Diameter :16mm(for 100 angle grinder used) Thickness:8mm Package Included: 10pcs Wool Wheels