Product Overview Part Number * 3M A-051111-50426Standard Pack - 1 EAFibre Discs 501C, Alumina Zirconia, 7 in Dia., 36 Grit Features: Constructed on a fibre backingAbrasive Material : Alumina Zirconia Applicable Materials : Metal Applications : Cool Grinding Arbor Diam : 7/8 in Body Material : Fiber Dia. : 7 in Grit : 36 Mounting : Arbor Hole Quantity : 100 per case Speed [Max] : 8,600 rpm Wt. : 4.73 lb