ITEM NAME:20 Pieces 4inch Wool Polishing Wheel Buffing Wheel Grinder Felt Polishing Discs Description: Made of white wool, durable and strong, dedicated for 100 angle grinder wool wheel. High degree wear-resisting, strong cutting force, sharp, highly active anti-clogging and good degree of finish. Wool wheel, mainly used for stainless steel, copper and aluminum and other metals and glass, furniture, ceramics, marble and other non-metallic fine polishing. Durable, washable and reusable, natural and environmentally friendly. Save time and working procedure, easy to use. Specification: Material: Pure Wool Thickness: Approx. 10mm/0.39 inch Diameter: Approx. 100mm/3.94 inch Outer Diamter: Approx. 98mm/3.86 inch Bore Diameter: 16mm (0.63 inch) for 100 angle grinder Package Includes: 20 Piece Wool Polishing Wheel Note: Please allow 3-5mm error due to manual measurement,.Made of white wool, durable and strong, dedicated for 100 angle grinder wool wheel. 20 Piece Wool Polishing Wheel. Material: Pure Wool.