This premium package includes: 84 sheets of Mouse precision sander sandpaper in 7 different qualities: 40/60/80/120/180/240/320grit, 12pcs each. Sandpaper size is 3.5*5.5inch, suitable for 140mm sander. Backing: hook and loop, easy and quick to stick, sturdy, durable and practical Made of high quality alumina abrasive, the sandpaper is durable and anti-static, ideal for sanding and polishing. Come with coarse, medium and fine grades, widely used in grinding and polishing metal and non-metal, wood, rubber, leather, plastic, stone, glass and other materials.