Feature: 1. Fitment: Replacement for Tohatsu 4‑stroke outboard motors: MFS9.9, MFS15, MFS18, MFS20. 2. OE Number: Replacing part numbers for reference: 334‑65021‑0 334650210 334650210M, 18‑8921. 3. Premium Material: Using strongest marine and chemical corrosion resistant hardened nylon and scientifically engineered high performance neoprene rubber. 4. Function: The outboard water pump impeller can effectively improve the performance of the pump. 5. Good Replacement: Easy installation and practical, can directly replace the broken or shabby water pump impeller. Specification: Item Type: Water Pump Impeller Material: Neoprene Rubber+Nylon Quantity of Blades: 8 Height: Approx. 23.51mm/0.93in Total Diameter of Outer Impeller: Approx. 41.11mm/1.62in Inner Shaft Insertion Diameter: Approx. 13.88mm/0.55in OE: 334-65021-0 334650210 334650210M, 18-8921 Application: Used to refurbish and replace or repair the original damaged and worn impeller, aiming to improve the performance of the pump Fitment: Replacement for Tohatsu 2-stroke outboard motors: M9.9, M12, M15, M18 Replacement for Tohatsu 4-stroke outboard motors: MFS9.9, MFS15, MFS18, MFS20 Replacement for Nissan 2-stroke outboard motors: NS9.9, NS15, NS18 Replacement for Nissan 4-stroke outboard motors: NSF9.9, NSF15, NSF18, NSF20Replacement for Nissan Outboard Motors 9.9HP 15HP 18HP 20HP . Package List: 1 x Water Pump Impeller Note: 1. Please double check the part number of your item, matching information is for reference only.2. If you are unsure of the item, please contact us before buying to avoid unnecessary return, thanks!