MASTER AIRSCREW 13 X 8 SCIMITAR S2 SERIESFeatures a scimitar-shaped blade with swept tips and under-cambered blades. Provide great speed, thrust and noise suppression. Perfect for high performance models. Made of Glass Fiber Reinforced Composite. Available in sizes 6" to 16". Propeller diameter 13" / 330mm Propeller pitch 10" / 254mm Hub thickness 5/8" / 15.9mm Shaft diameter 1/4" - 5/16" / 6.35mm - 7.94mm * Propeller Weight 1.69oz / 47.9g Direction of rotation Normal / Tractor Material Glass Fiber R Composite Color Black