This is the Master Airscrew 5x3 3-Blade Series Propeller.FEATURES: Constructed of glass-filled nylon for strengh and durability Greater thrust at lower RPMs NACA airfoils, true pitch and accurately balanced High thrust and low noiseINCLUDES: One Master Airscrew 5x3 3-Blade Electric PropellerREQUIRES: Installing on aircraftSPECS: Length: 5" (150mm) Pitch: 3Master AirscrewPart MASMA0530TE