Brass shell; sae 74c grade b, copper tubing; 19.000 in. Lg o/a; 2.500 in. Diameter center; 2.000 in. Diameter ends; 0.188 in. Diameter tubing, 0.065 in. Shell wall thk; approx 20 turns of tubing at .50 to .56 pitch; 114-18 nptf thd inlet and outlet spaced 14.500 in. C to c on side of cooler