vertical impeller flap discPartical size: 60,80,100,120,150,180,240,320Drag over diameter: 4inches  5inchesstructure: abrasive,Website:http://www.chinaabrasivegrinding.com, base and bondusage: processing of metal materials of high tensile strength and grinding, polishing, oxide layer, derusting of the outer R surface Characteristics: safety, environmental protection ,sharp itself, continuous piece, above 96% utilizationpacking specification: 300 pieces one case