About this item 【SPECIFICATIONS】 Size: (140mm/5.5" * 98mm/3.9")/(H * W). 30Pcs * 400grit mouse sandpaper, fit to 140mm mouse sander machine. 【DURABLE MATERIAL】 Premium aluminium oxide abrasive and high quality latex base paper for a sharp cut and better polishing effect. Hook and loop backing makes grit removal & replacement quick and easy, and well fitting in mouse sander during woodworking and metalworking. 【DUST EXTRACTION】 Pre-punched with 6 holes for efficient dust extraction. 【WIDELY APPLICATIONS】 Ideal for polishing the surface of metal, non-metal, wood, rubber, leather, plastic, stone, glass; removing rust and burr. Widely used in automobile, furniture, glass, painting, industrial, etc. 【CUSTOMER SUPPORT】 Backed by SPEEDWOX lifetime guarantee. We value every single customer feedback, always friendly customer service behind SPEEDWOX products, 100% MONEY BACK guarantee.