Feature 1OE Number: The replacement part number for GLM is 21900, for OMC is 983937, and there are other reference part numbers are 182100, 30 60794A4, 38538070. 2Strong Compatibility: Specially designed replacement for OMC Cobra, replacement for Mercruiser Bravo and Alpha Gen 1 and 2. Fits for MC1 R MR, for Penta. 3High Strength Material: Constructed with reliable alloy steel, the gimbal bearing can withstand daily wear and tear, ensuring lasting use and durability. 4Boost Efficiency: With the high grade gimbal bearing, boat working's efficiency is improved greatly. Drive with ease while enjoying the improved efficiency of your boat's performance. 5Simple Installation: Installing the boat gimbal bearing is a convenient task that saves time and doesn't require a bounty of tools or complex procedures. Item Type: Boat Gimbal Bearing Material: Alloy Steel OE: for GLM Part Number: 21900 for OMC Part Number: 983937 Other Part Number: 182100, 30 60794A4, 38538070 Fitment: Replacement for OMC Cobra Replacement for Mercruiser Bravo and for Alpha Gen 1 and 2. Fits for MC1 R MR Fits for Penta Package List 1 x Gimbal Bearing Note Please double check the part number of your item, matching information is for reference only.