Features: 1. Fitment: U joint drive bellows is a replacement for Mercruiser Alpha One Stern Drives 1972–1991, precise fit. 2. Replace Part Number: Part number 60932A4, replaces GLM 89050 and Sierra 18-2751. 3. : U joint bellows constructed from premium rubber material with 2 stainless steel clamps for secure, durable performance. 4. OEM Standard Design: Engineered to original equipment specifications for direct replacement of worn or damaged U joint drive bellows. 5. Easy Installation: Direct fit design allows for simple installation without modifications, saving time and effort. Specification: Item Type: U Joint Bellows Material: Stainless steel + rubber Replace Part Number: 60932A4, replaces GLM 89050 and Sierra 18-2751 Application: Aftermarket replacement part designed to meet or exceed OEM standards; replaces original damaged bellows Fitment: Compatible with Mercruiser Alpha One Stern Drives from 1972 to 1991 Fits drives from mid-1972 through 1990 Fits all 1 units with ridge (S/N 3469428 and up) Note: Please verify the part number of your unit. Compatibility information is for reference only. If uncertain, before purchase to avoid returns.