Uxcell 4Pcs RC Propellers 2 Vane Blades Props 6x4", 11x55" Grey with Adapter Rings

What is this?RC propellers are used on fixed wing airplanes, aircraft, the excellent prop replacements.What will I get?Package Content: 4 pcs x Fixed-wing Airplane Propeller; Vane Quantity: 2; Style: 6x4 inch, 11x55 inch ; Propeller Diameter: 6, 11 inch; Height: 6,11.5 inch.Propeller Washers Size: 3mm/4mm/5mm/6mm/8mmAre there any advantages of the product?This propeller can find the best size and pitch for your aircraft, it is really easy to balance, making this propeller fit for your electric airplane, good for general aircraft flying.How to use it?The 2 Vane RC airplane props are made of plastic material that reduces rotating mass for higher output and longer life.What should;I notice?Please check the Rotating Diameter and Pitch before ordering to make sure it is fit for your RC plane motor.