... -starElliptical Grain mediaFan MediaCubic mediaOblique triangleOblique CylinderQudrilateral Examples: Table for Mass Finishing Media SelectionPrecisionMain ApplicationMediaGranularityCommonDeburring, deoxidation, derusting, heavy ... corumdum240-1200#HighestFinishing, polishing, surfacing smoothing; finishing or polishing for soft metal, aluminum, zinc, copperHigh alumina media, 3P ...