Features: 1.U?joint bellow suitable for Mercruiser Alpha One Gen II sterndrives transom 1991 ? current. 2.Part number 816431A1, wonderful replacement for the previous old or broken one. 3.Replaces for mercury marine/quicksilver, high quality and long?lasting durability. 4.Designed to meet or exceed original specifications and standard, perfect match. 5.Manufactured from premium rubber material, wear?resistance and corrosion?resistance, having stable performance. Specification: Conditon: 100% Brand New_x000D_ Item Type: Exhaust Bellow_x000D_ Material: Rubber_x000D_ Color: Black+Silver_x000D_ OEM: 816431A1_x000D_ Replaces for Mercury Marine/Quicksilver_x000D_ Interchanges With:_x000D_ for Mercury - 816431A1_x000D_ for Mallory - 9-72704_x000D_ for GLM - 89180_x000D_ for Pro Marine - 64431_x000D_ for Redline - RL2747_x000D_ Fitment: Fit for Mercruiser Alpha One Gen II sterndrives transom 1991 ? current PackageList: 1 x Bellows1 x Flange Hoop1 x Connecting Metal Ring2 x Wire Gasket Note: Please double check the part number of your item, matching information is for reference only._x000D_ If you are unsure of the item, please contact us before buying to avoid unnecessary return, thanks!