1/4 Inch Inside Diameter, 7/16 Inch Actual Brush Diameter, Carbon Steel, Power Fitting and Cleaning Brush

1/4 Inch Inside Diameter, 7/16 Inch Actual Brush Diameter, Carbon Steel, Power Fitting and Cleaning Brush 1/4 Shank Diameter, 3-1/8 Inch Long, Hex Shaft Stem, 3/8 Inch Refrigeration Outside Diameter