Tube Brush Product Type Single Spiral Tube Brush Stem Style Double Brush Material Nylon Brush Dia 1 1/2 in Compatible Tube Outer Diameter Not Applicable Stem Diameter 1/4 in Brush Length 2 1/2 in Wire Dia 0.035 in Overall Length 5 1/2 in Compatible Tool Type Drill Operating Speed - Maximum 2 000 RPM