Features: 1. Part Number: Replaces OEM numbers 369-65021-1, 47-16154-3, and 18-3098 for reference. 2. Function: Neoprene impellers are used for marine water pumping applications including engine cooling, water transfer, wash down, and bilge water pumping. Suitable for use in both fresh and salt water. 3. Impeller Size: The hydromotor impeller has 6 blades. Height is 14.30mm (0.56in), external overall diameter is 33.58mm (1.32in), inner shaft insert diameter is 10.25mm (0.4in). 4. High Performance: The flexible 6-blade impeller undergoes a rigorous quality process to ensure reliable, efficient, and long-lasting performance. 5. Recommendation: Replace the flexible pump impeller at least once per year, or more frequently depending on engine usage. It is advisable to keep a spare impeller on hand. 6. Premium Material: Constructed from high-quality nylon and neoprene, the impeller simplifies water pump service and maintenance. Package included: 1 x Water Pump Impeller