uxcell 2pcs Plastic Gas Engine Propeller Prop 10x4 for RC Airplane Aircraft Product Name : RC Airplane Engine Propeller;Model : 10x4;Vane Number : 2 Prop Shaft Hole Dia : 6.3mm / 0.25";Total Length(Rotating Diameter) : 252mm / 10" Pitch : 4";Max Thickness : 13mm /0.51" Material : Plastic;Color : Gray Net Weight : 44g;Package Content : 2 x Engine Propeller