This is the Master Airscrew 6x4 3-Blade Propeller. FEATURES: Constructed of glass-filled nylon Great scale look with greater thrust at lower RPM NACA airfoils, true pitch and accurately balanced INCLUDES: One Master Airscrew 6x4 3-Blade Propeller REQUIRES: Installing on aircraft SPECS: Length: 6" (150mm) Pitch: 4" (100mm) DMA-10/9/3 ir/jxs