Boat Motor Water Pump Impeller 47-19453T 18-8900 for Mercury Mariner 50hp 55hp 60hp Outboard Engine Number of Blades: 6 Height: 24.60mm External Impeller Overall Diameter: 78.31mm Internal Shaft Insert Diameter: 19.20mm Net Weight: 44g A External Impeller Overall Diameter: 78.31 mm B Height: 24.60 mm C Internal Shaft Insert Diameter : 19.20 mm Net Weight: 44 g Number of Blades: 6 Condition: New All parts are available in stock, we can ship it out within 1-2 business days!