FEIHU various types of sandpaper: 60/100/120/180/240/320 classification of sandpaper, each type 5 pieces sandpaper, total 30 pieces to meet all your requirements from coarse to super fine Diameter: Hook and Loop Discs 250 mm For use with sander polishers Hook and Loop sanding pad:The round sanding paper have hook and loop design on back,It’s easy for you install the round discs on rotary machine.Simple installation and easy sandpaper change. Wide Application:Our assorted grit sandpapers can work on a wide range of surfaces. They are recommended to work on wood/metal parts and surfaces, but they can also be used on non-metal surfaces and handle a variety of abrasives, in particular, grinding, deburring, polishing and derusting Applicability: our sanding disc for electric sanders is compatible with all 250 mm sanders on the market. It is perfect for smaller jobs, but can also be used for larger jobs.