Product Name: 2 BladeRC Airplane CW CCW Propeller;Model: 8 x 4.5L;Fit Motor Shaft Diameter: 6mm / 0.24"Adjustable By Hole Adapter: 3mm, 3.2mm, 6mm, 6.35mm, 4mm, 3.5mm, 5mm, 4.8mm;Total Length(Rotating Diameter): 208mm/ 8"Pitch: 114mm/ 4.5";Hub Thickness: 10mm / 0.4"Material: Plastic;Color: BlackWeight: 87g;2 Blades Counter Rotating CW/CCW Propeller Main Rotor Blade 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.ccessory only, Model Plane is not included here.Package Contents:5 Pair x 2 Blade RC Airplane CW CCW Propellers10Pcsx LocatingRings(Each 8 in 1)Only the above package content, other products are not included.Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.