Hypodermic needle cannula grinding wheel Abrasive Material: Aluminum Oxide, White aluminum oxide, green silicon carbide Type: Flat, dingle flange, double flange Application:for hypodermic needles grinding Size (MM)SpecificationTypeM/S128-600WA,GCFlat, dingle /double flange50200-600WA,GCFlat, dingle /double flange50300-600WA,GCFlat, dingle /double flange5020-200WA,GCFlat, dingle / ...