Impeller 375638 775518 18-3002 for Johnson Evinrude OMC 10HP 15HP18HP 20HP 25HP 35HP outboard motors Number of Blades: 6, Brass Hub Height: 13.08mm External Impeller Overall Diameter: 69.37mm Internal Shaft Insert Diameter: 12.68mm Net Weight: 42g A External Impeller Overall Diameter: 69.37 mm B Height: 13.08 mm C Internal Shaft Insert Diameter: 12.68 mm Number of Blades: 6 Net Weight: 42 g Brass Hub Condition: New All parts are available in stock, we can ship it out within 1-2 business days!