Replacing OEM numbers : 91-904551,91-90455-1, which is a direct replacement for the old or broken one. Compatibility: This product is Compatible with Mercury Marine 50 HP and above two-stroke outboards (Not Compatible with Verado), and can be screwed into the 1-1/2 inch fine thread above the flywheel nut using a tool. Function: This universal lifting ring plays a vital role in the safe lifting and handling of outboard engines. Its design ensures safe and efficient operation, making engine maintenance and repair easier. Product Material: This product is specially designed and made of metal, which has a long service life and is not easy to damage. Easy to install: Direct replacement without adjustment, perfect compatibility and high reliability., Manufacturer: Briny River