Aftemarket Water Pump Impeller 19210-ZY3-003 18-3031 for Honda Outboard Motors Number of Blades: 6, Net Weight: 63g Plastic Hub Height: 30.39mm External Impeller Overall Diameter: 89.41mm Internal Shaft Insert Diameter: 25.77mm A Overall Diameter: 89.41 mm B Height: 30.39 mm C Shaft Diameter: 25.77 mm Net Weight : 63 g Number of Blades: 6 Plastic Hub Material: Neoprene Use: Cooling Systems (Water) Condition: New All parts are available in stock, we can ship it out within 1-2 business days! Installation Instructions: Lubricate with silicone grease, glycerine or dish soap when installing. (Not included).