2.9 gallon (11 liter). Takes a 83-up screw type gas cap and a 22mm threaded petcock. Old School with capital letters in a Sportster design. Complete with a extra low tunnel that is just 1-1/4″ deep and a flat bottom to sit high on the frame for the classic Frisco style. Approx. dimensions: 16″ tank length; 11″ tank width; 8″ tank depth; 16″ tunnel length; 1?” tunnel depth; 2?” tunnel width; Mount hole to hole 16-5/8″. Note: It is advised to pressure test; seal and test fit all tanks before tanks are painted and installed. Some tanks are painted; but this coat is applied for rust prevention during storage only.