Standard pack = 1 piece(s). Type = Tube Brush ; Brush Diameter =0.043 Inch ; Bore Diameter = 0.039 Inch ; Material = Abrasive Nylon; Stem Diameter = 0.016 Inch ; Brush Part Length = 0.625 Inch ; Tip Style =Bottom End ; Filament Diameter = 0.008 Inch ; Overall Length = 3 Inch ; .