Item specifics: Length of side: 140mm High removal rate. All sheets are designed to be used dry. They are ideal for use on wood，metal and leather. Sanding sheets are manufactured from Aluminium Oxide abrasive on a flexible paper backing. They have the added convenience of a hook & loop quick change system and are pre-punched for use on hand held sanders with integral dust extraction systems.18 Sandpaper Sheets， Includes: 4pcs 40 Grit 4pcs 80 Grit 4pcs 120 GritPackage Included: 1X Pack of Sanding Sheet (12Pcs)