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 300 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. Fits Great:Our sanding discs for electric sander are compatiable with all of the 300 mm ramdom orbital sanders available on the market. And it is perfect for smaller jobs but also can be used on big jobs 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