CTA Tools 3490 Steel Line Stopper Set, 2-Piece Seals Steel Lines Found on Fuel, Brake, AC, Power Steering, Transmission Cooling Lines and Banjo Lines Prevents Leaks and Contamination For Use with All Automotive Fluids Fits 3/8-Inch, 1/2-Inch, 5/16-Inch and Banjo Lines Heavy-Duty Construction Allows for Strength and Durability