1、Fitment: Replacement for MR Alpha One 1983-1990 Serial Range 6225577 and UP; replacement for MerCruiser Alpha One SS 1986-1989 Serial Range 0A545004 and UP. 2、OE Number: The part numbers for reference are 30-803097T1, 18-2601-1, GLM 21950, please confirm whether it is consistent with the OE you need. 3、Package Contains: Transom bellows kit includes U joint bellows, exhaust bellows, shift bellows, water hoses, gimbal bearing, outdrive gasket set and hose clamp. 4、Premium Material: The bellows is made of marine grade rubber and the clamps are made of stainless steel, high strength, wear resistant, and long in lifespan. 5、Easy Installation: The kit is conveniently designed for easy installation, allowing boat owners to easily replace old or damaged parts, saving both time and costs on professional labor.