Outboard Water Pump Impeller 21213664 for Gas Sterndrive Marine Engine Cooling System Replacement Features： 1、Applicable Model: The water pump impeller is for gas sterndrive. Please confirm whether it is consistent with the product you want before buying to avoid unnecessary return. 2、OE Number: The part numbers for reference are 3584350, 3588914, 3841696, 3842786, 21213664. Please confirm whether it is consistent with the OE you need to avoid wrong buying and other problems. 3、 Material: The water pump impeller features durability and performance, with 12 blades and 12 teeth for efficient, stable performance, made of high strength rubber and metal for long lasting reliability. 4、Enhanced Cooling Efficiency: Upgrade your old worn out impeller with this kit, providing higher flow and better cooling to protect your engine for a longer lifespan. 5、Precise Control: This pump impeller kit is designed and manufactured with advanced technology, ensuring superior performance, delivering exceptional driving force and precise control. It is also easy to install and requires no complicated tools. Specification： Item Type: Impeller Blades: 12 Blades Teeth: 12 Teeth Impeller Width: Approx. 58mm / 2.28in Impeller Length: Approx. 48mm / 1.89in Impeller Shaft Inner Diameter: Approx. 18mm / 0.71in OE Number: 3584350, 3588914, 3841696, 3842786, 21213664 Fitment: Fit for gas sterndrives 2005-1/2 and newer. Will not fit gas sterndrives 2005-1/2 and earlier model Package List： 1 x Impeller 1 x Gasket 2 x Washer