3Pairs 12 x 4.5R 1245R Two Blades CW CCW Black Plastic Propellers Product Name : 2 Vanes RC Airplane CW CCW Propeller;Model : 12x 4.5R;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) : 304mm/ 12" Pitch : 114mm/ 4.5";Hub Thickness : 10mm / 0.4" Material : Plastic;Color : Black Weight : 90g;Package Content : 3Pairx 2 Vanes RC Airplane CW CCW Propellers6Pcsx LocatingRings(Each 8 in 1)