MASTER AIRSCREW 9.5 X 6 PROP GF SERIESPerformance Propellers for Model Airplanes - GF Series GF Series is specially designed for sport flying and high performance model R/C airplanes with electric motors or glow engines. Made of Glass Fiber Reinforced Composite for strength & durability. Propeller diameter 9.5" / 241mm Propeller pitch 6" / 152mm Hub thickness 7/16" / 11.1mm Shaft diameter 1/4" - 5/16" / 6.35mm - 7.94mm * Propeller Weight 0.71oz / 20.1g Direction of rotation Normal / Tractor Material Glass Fiber R Composite Color Black