2.9 gallon (11 liter). Low tunnel. Takes a 83-up screw type gas cap and a 22mm threaded petcock. Traditional Sportster King style tank with a low tunnel; horseshoe front & tab rear mount. Approx. dimensions: 16″ tank length; 11″ tank width; 8″ tank depth; 16″ tunnel length; 3″ 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.