Package includes 40PCS sandpaper Product dimensions: 18.5L x 9.3W centimetres Grit type: Coarse, Medium, Fine Grit material: Aluminum,Resin Grit number: 40, 60, 80, 120 Material Aluminium Oxide, Compatible material Wood, Glass, Leather, Aluminium, Plastic, Metal, Rubber, Stone Compatible devices: Orbital Sander About this item: Everything you need - including 4 types of different grits, from coarse to fine: 40, 60, 80, 120, 10 sheets per grit, total 40 sheets that can meet almost all your general polishing requirements. PREMIUM QUALITY - The sanding sheets made of high quality aluminum granulate and high strength resin material can prevent pilling, sandpaper for mouse sander, anti-static and anti-blocking, good choice for grinding and polishing. Grit marking - Each sandpaper measures approx. 93 x 185 mm; with grain mark on the back, the smaller the number, the rougher the polishing effect, the larger the number, the finer the polishing effect, please choose the use according to your needs. Backing - With velcro sanding sheets, you can easily and quickly stick the sanding sheets to detail sander, pre-punched with 8 holes for dust extraction. WIDE APPLICATION - The sanding pads are commonly used to remove rust from metal surfaces and polish or sand non-metallic objects such as plastic, wood, rubber, leather, gl, stone and more.