15pcs Green Film Sanding Discs - [5 Inch 60 Grits 8 Hole ] Round Aluminum Oxide Hook & Loop Film Bac Assorted grits to meet all kinds of sanding requirements from coarse to fine grade. Coarse : 60#--120# Goodfor rough sanding and removing layers of old paint quickly, includingrough sanding of polyester putty, steel plate, and wood material. Medium : 120#--600# Makesa good starting for most projects, feather sanding, grinding ofpolyester putty, aluminum plates, fiberglass, metal materials, and wallshaping. Fine : 600#--1200# Great for fine sanding of polyesterputty, paint primer, and old paint, used for fine grinding and fineshaping of furniture, amber, metal, etc. Extra Fine: 1200#--3000# Used for light sanding between coats of finish and to sand metal, hardwood, stone, and other non-metallic materials. Super Fine: 3000#--10000# Mainly used for mirror polishing of metal, stone, non-ferrous metal, water-based paint, glass, and other objects. NOTE: Please refer to the image of size and choose the sandpaper suitable for your sander. Thelarger the mesh number, the finer the sand particle size; conversely,the smaller the mesh number, the coarse the sand particle size.