Features: 1. Fitment: U joint drive bellows is a replacement for Mercruiser Alpha One Stern Drives 1972–1991, perfect match. 2. Replace Part Number: Part number is 60932A4, replacement for GLM 89050, replacement for Sierra 18-2751. 3. : U joint bellows made of high quality rubber material with 2 stainless steel fixed clamps, durable and reliable. 4. Standard: Designed to specifications for direct replacement of old or damaged U joint drive bellows kit. 5. Simple Installation: Easy to install, no modifications required, saves time and effort. Specification: Item Type: U Joint Bellows Material: Stainless steel + rubber Replace Part Number: 60932A4, replacement for GLM 89050, replacement for Sierra 18-2751 Application: Aftermarket replacement part that meets or exceeds OEM standards, direct replacement for damaged bellows Fitment: Replacement for Mercruiser Alpha One Stern Drives 1972–1991 Fits drives from mid 1972 to 1990 Fits all 1 units with ridge (S/N 3469428 and up) Note: Please double check the part number of your item; fitment information is for reference only. If you are unsure about compatibility, verify before purchase to avoid returns.