MASTER AIRSCREW 3 BLADE 10 x 5 PROP3-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 10" / 254mm Propeller pitch 5" / 127mm Hub thickness 1/2" / 12.7mm Shaft diameter 1/4" / 6.35mm ** Propeller Weight 0.95oz / 26.9g Direction of rotation Normal / Tractor Material Glass Fiber R Composite Color Black