1Fitment: U joint drive bellows is replacement for Mercruiser Alpha One Stern Drives 19721991, perfect matching. 2Replace Part Number: The part number is 60932A4, replacement for GLM 89050, replacement for Sierra 182751. 3High Quality Material: U joint bellows is made of high quality rubber material, with 2pcs stainless steel fixed clamps, firm and durable. 4Original Standard: According to original standard, you can directly replace the old or broken U joint drive bellows kit. 5Simple Instalaltion: The installation is simple, no modification is required, convenient for using, save your time and energy. Item Type: UJointBellows Material: Stainless steel + rubber Replace Part Number: 60932A4, replacementforGLM89050, replacementforSierra182751 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 19721991 Fits for Drives from mid 1972 to 1990 Fits for All 1 Units With Ridge (S/N 3469428 Up) 1 x UJointBellows(With 2pcs Fixed Clamp) 2 xGround Clamp 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