Factory of 2/3/4 blade Nylon Rubberboat outboard Engine Impeller Size:: Diameter 200mm-1070mm Productivity: 50, 000 PCS/Y 3-blade MC Nylon Rubberboat Outboard Engine Impeller Specification: Advancement: MC Nylon propeller, including blades, hub tube, in which the thickness of the same type of hub cast iron cylinder propeller hub tube 1.5-2 times the thickness. Comparing with the Metal Propeller , ...