Standard pack = 1 piece(s). Type = Bore Brush ; Diameter = 4 Inch ; Face Width = 1 Inch ; Fill Material = Abrasive Nylon ; Grain Type = Ceramic ; Grit = 80 ; Industry = Aerospace ; Maximum RPM = 6000 ; Trim Length = 1.040 Inch ; Stem Color = Grey ; Stem Diameter = 3/8 Inch ;