Sanding Disc: 4"(please allow about 0.1" error due to manual measurement) Hook-and-loop backing makes for easy installation and removal Suede thickening, fine sand, more wear-resistant Aluminum oxide grain delivers a fast, exceptionally long lasting cut. 10 Grits sandpaper assortment from rough to fine to satisfy almost all your general polishing requirements The sandpaper is perfect for professionals, homeowners, hobbyists and more. Generally used for automobile and accessories, electric, paint, aluminium alloy, metal, plastic, wood etc. Notice:Cann't be used in Wet. Package include: 10 x 80 Grit Sanding Discs 10 x 100 Grit Sanding Discs 10 x 180 Grit Sanding Discs 10 x 240 Grit Sanding Discs 10 x 600 Grit Sanding Discs 10 x 800 Grit Sanding Discs 10 x 1000 Grit Sanding Discs 10 x 1200 Grit Sanding Discs 10 x 2000 Grit Sanding Discs 10 x 3000 Grit Sanding Discs