Perfect for metallic and non-metallic materials polishing,sanding and grinding Suitable for portable electric belt sanders and bench grinder,Durable and practical to use,Easy to install and operate Widely used in metallurgy,machinery,shipbuilding,light industry,leather,wood,building materials,textile and other industries Great for non-metal grinding and polishing,such as plywood,particle board,decorative plates,bamboo and rattan products Perfect for metal grinding and polishing,such as stainless steel,non-ferrous metal,black metal plates and blades, and High Quality Color:reddish brown Material:Alumina Size:50*686mm Package Contents: 2 *60 grits 2 *120 grits 4 *150 grits 2 *240 grits Only the above package content, other products are not included. Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.