Check the listing for details. 3" 50pcs Assorted Grits Sanding Discs with 6mm Shank Backing Pad + Foam Pad. Condition: New. Listed at 19.99 USD. Package Include: 5 x 60 grit white dry H&L sanding discs 5 x 120 grit white dry H&L sanding discs 5 x 180 grit white dry H&L sanding discs 5 x 240 grit white dry H&L sanding discs 5 x 400 grit white dry H&L sanding discs 5 x 600 grit white dry H&L sanding discs 5 x 800 grit white dry H&L sanding discs 5 x 1000 grit white dry H&L sanding discs 5 x 5000 grit waterproof H&L sanding discs 5 x 10000 grit waterproof H&L sanding discs 1 x 3" Hook & Loop Back-up Sanding Pads 1 x soft sponge interface buffer pad Features: White dry sanding discs: Prevent clogging, anti-static, good flexibility, wear resisting.It can be widely used in automobiles, electric machinery metal goods, furniture instrument, handicraft article, plastic, leather, stone surface cutting and polishing.Waterproof (wet/dry) sanding discs: It's more effective used wet because clogging is reduced by particles washing away from the grinding surface. It can be used for mold surface precise sanding, and also in stone, lacquer surface, mirror surface treatment such as headlamps polishing. Waterproof sanding discs can be used for dry sanding too, it's more suitable for high-precision polishing than white dry sandpaper.Grit refers to the average particle diameter. The larger the grit, the smaller the particle size. The smaller the grit, the coarser the particles are. Sanding Pad Parameter: Density: mediumPad diameter: 3 inch (75mm)Pad weight: 27.3g(0.96 oz)Shank weight: 12.2g(0.43 oz)Shank diameter: 3mmMax operation speed: 10000rpm Sponge Pad Parameter: Density: softDiameter: 3 inch (75mm)Thickness: 1/2 inch (13mm) Weight: 4.7g(0.16 oz)