Features: 1.Fitment: U joint drive bellows is replacement for Mercruiser Alpha One Stern Drives 1972?1991, perfect matching. 2.Replace Part Number: The part number is 60932A4, replacement for GLM 89050, replacement for Sierra 18?2751. 3.High Quality Material: U joint bellows is made of high quality rubber material, with 2pcs stainless steel fixed clamps, firm and durable. 4.Original Standard: According to original standard, you can directly replace the old or broken U joint drive bellows kit. 5.Simple Instalaltion: The installation is simple, no modification is required, convenient for using, save your time and energy. Specification: Item Type: U Joint Bellows Material: Stainless steel + rubber Replace Part Number: 60932A4, replacement for GLM 89050, replacement for Sierra 18?2751 Application: After sale replacement parts, meet or exceed OEM standards, directly replace the original damaged old bellows Fitment: Replacement for Mercruiser Alpha One Stern Drives 1972?1991 Fits for Drives from mid 1972 to 1990 Fits for All 1 Units With Ridge (S/N 3469428 Up) Note: Please double check the part number of your item, matching information is for reference only. If you are unsure of the item, please contact us before buying to avoid unnecessary return, thanks!