This is a reproduction fuel tank made to fit the 1961-1964 models including the Impala, Bel Air and Biscayne. It does not fit the wagon models. It is a 20 gallon (76 liters) capacity tank. It includes the fuel sending unit lock ring and O-ring. The lock ring has a 1-3/4 inch gauge hole diameter. There are no vent tubes included. The tank measures 38-1/4 inches by 15-1/8 inches by 11-1/8 inches.