vertical impeller flap discPartical size: 60、80、100、120、150、180、240、320Drag over diameter: 4inches  5inchesstructure: abrasive,Website: , 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