Lamellar disc, grain size: 40 grain type: alumina binder: synthetic resin base material: elastic fabric - 100% cotton (240-260g / m2) design: curved hole: 22.2 mm, max. Working speed: 80 m / s, max permissible speed: 13300 1 / min, use: grinding, grinding, rust removal, paint removal, ...., dimensions: stated in the product name. [***]