rectangular tin flap wheelpartical size:50 60 100 120 150 180 320drag cover diameter:4inchesdrag cover material: rectangular tinstricture: abrasives,Website:http://www.chinaabrasivegrinding.com, iron cover, strengthen cloth, bonding agentusage: the grinding, polishing, deburring, oxide layer, derusting of different workpieces which are made in metal materials. such as automobile production, motorcycle production, anti-theft doors and windows, home appliance or large fram of commercial generator, all kinds of indoor outdoor furniture, aerospace, marine, hydropower equipment and boiler production.characteristics: safety, environmental protection, high temperature resistance, corrosion resistance, chemical stability, high strength, good toughness, good self-sharpening,above 96% efficiency.packing specifications:300pieces one case