This Westerbeke marine generator is the perfect addition to any boat. With a power output of 20.0 BEDA and a water injected exhaust elbow, it provides reliable and efficient performance. The brand, Westerbeke, is known for its high-quality marine products and this generator is no exception. Its manufacturer part number is 038760, and is considered a 2 inch. I purchased this part new and turned out I needed a 3" so this one is unused. Cast Aluminum.