The exhaust bellows are ribbed and flexible tubing. The bellows limit the movement/kinetic energy within or generated from the engine to high-cost emissions systems. It absorbs displacements and vibrations and accommodates thermal expansion. It complies with international internal combustion engine emissions. The exhaust BELLOW KIT 92-89100 has clamps, clips, and a Transom plate to the bell housing. The EXHAUST BELLOW KIT 92-89100 complies with international internal combustion engine emissions standards. The EXHAUST BELLOW KIT 92-89100 is interchangeable with Mercruiser 18654A1. Fit Gen I, Alpha I, II, Bravo I, II, and III. Key Features Exhaust Bellow compatible with Mercruiser The bellows are flexible, durable rubber construction for durability. It has stainless steel hose clamps at each end. Fit 1, R, MR, TRS, and Blackhawk models, Reolaces Mercruiser 8M0124227 18654A1 32734A3 32734 Sierra 18-2750 It has 2 1/2" I.D. and is approximately 5 1/4" long. Specifications BRAND: GLM PRODUCTS SKU:92-89100 UPC:754739891001 Weight:0.44 LBS Unit Of Measure: EA