Overflow Tank, 2 in Diameter x 15 in Long, Stainless Steel, Each This is the standard coolant overflow tank used on our complete Mk4 Roadster and Type 65 Coupe kits. Made of stainless steel, the capacity is 0.82 qt, and the tank measure 2" in diameter by 15" long. Stainless steel tank captures coolant overflow and recirculates it to the radiator. Machined aluminum cap twists into the filler neck and seals with an O-ring. Inlet/outlet fittings accept 1/4 inch diameter hose. Unit includes mounting brackets and hardware. Measurements are of tank body; add 2 inch for overall length.