Weiler 3 1/4 in (L) Curved Plastic Handle Internal Fitting Tube Brush is used in trucking and marine industries. Weiler Fitting tube brush measuring 3/4 dia x 1 has tube of 5/8 dia and features 3 1/4 curved plastic handle. Brush is ideal for internal cleaning and deburring of copper tube fittings. • Diameter: 3/4-inch. • Brush length: 1-inch. • Overall length: 6 1/2-inch. • Tube diameter: 5/8-inch. • Handle type: Curved. • Used for cleaning the inside of a copper fitting prior to soldering. • Used for internal cleaning and deburring of copper tube fittings. • Used in trucking and marine industries as a light socket cleaning brush. • Sold as 1 Each.