Marine Salt water Heat Exchanger. Solid Bronze. Old school type. Hard to find.
This weighs 5 1/2 LB. It measures 6 5/8" tall, The Mounting base 2 holes measure 3 1/8" wide, and main Cooling part is 3" around. It mounts with two 3/8" diameter Bolts. Two Salt Water hoses, with an inside diameter of 13/16" to 7/8", push on at two places and you use hose clamps here. The other two spots have female 1/4" standard pipe threads. There is actually 3 spots.(1 inlet and 2 outlets.) The Bolt that holds this together is Bronze and measures 3/8" by 5" long. You will need to make two round Gaskets for this.(2 3/4" OD. by 2 3/8" ID. by maybe 3/16" thick?) There are two 1/8" pipe plugs to drain this to winterize it. It says on it: GROSS MECH. LAB, BALTO MD. PATENT 1776726.
Being sold as-is. 4 Pieces total. $100.
This can be shipped for $18 in the USA. with Pay-Pal.