MASTER AIRSCREW 3 BLADE PUSHER PROP 14 X 73-Blade Propellers for Model R/C Airplanes 3 blade model airplane propellers specially developed for the most demanding hobby professionals. Great performance and scale look both for electric motors and glow engines. Carefully crafted from Glass Fiber Reinforced Composite. Available in sizes 5" to 16". Propeller diameter 14" / 356mm Propeller pitch 7" / 178mm Hub thickness 11/16" / 17.5mm Shaft diameter 5/16" / 7.94mm ** Propeller Weight 2.52oz / 71.4g Direction of rotation Reverse / Pusher Material Glass Fiber R Composite Color Black