Standard Pack = 1 piece(s). Type = Tube Brush ; Brush Diameter = 0.05 Inch ; Fill Material = Nylon ; Brush Length = 1/2 Inch ; Brush Type = Helical ; Overall Length = 4 Inch ; Abrasive Material = Silicon Carbide ; Grade = Super Fine ; Grit = 500 ; Shank Diameter = 0.023 Inch ;