6Pcs 12x4.5R 2 Positive Reverse Plastic Propellers w Adapter Rings

2 Counter Rotating CW/CCW Propeller Main Rotor for Copter Quadcopter 4-axis Aircraft UFO Plane. The hubs may be precisely adapted to motor shaft diameters of 3, 3.2, 6, 6.35, 4, 3.5, 5 and 4.8mm.Remove the desired locating ring by twisting. Accessory only, Model Plane is not included here.

Adjustable By Hole Adapter : 3mm, 3.2mm, 6mm, 6.35mm, 4mm, 3.5mm, 5mm, 4.8mm;Total Length(Rotating Diameter) : 304mm/ 12" Pitch : 114mm/ 4.5";Hub Thickness : 10mm / 0.4" Material : Plastic;Color : Black Weight : 90g;Package Content : 3Pairx 2 BladeRC Airplane CW CCW Propellers6Pcsx LocatingRings(Each 8 in 1)