Material: these mats are made of soft wool, elastic, safe, environmentally friendly, durable and long-lasting. Technical characteristics: this kit contains 10 polishing discs with the same characteristics techniques. With an outer diameter of 100 mm, an inner diameter of 16 mm and a thickness of 8 mm, it is ideal for angle grinders of 12000 rpm. Product type: 100 mm (4') wool sanding pad ideal for 100 angle grinders. Work: Made of thick wool and special glue, high temperature resistant, soft and durable. It will not scratch the object when polishing. Widely Used: Widely used for surface polishing and cleaning such as metal, glass and ceramic polishing , polishing marble, cars and wooden floors. 10 Pack 10cm Wool Polishing Discs Wear Resistant Angle Grinder Polishing Discs felt polishing. Specifications: Material: premium wool. Outer diameter: about 100mm. Inner diameter thickness: about 16mm. Thickness: about 8mm. Quantity: 10 pieces. Application: suitable for metal polishing, glass polishing and ceramics, marble polishing, automotive and wood floor polishing. List: 10 polishing discs. lucky to meet