Master Airscrew 13x8 3-blads  (1) Master Airscrew 3-blads for både fuel og elektromotorer.  13x8 - 3-Blade Propellers for Model R/C Airplanes   FB - factory balanced propeller - for more information click  here 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   13" / 330mm Propeller pitch   8" / 203mm Hub thickness   11/16" / 17.5mm Shaft diameter   1/4" / 6.35mm ** Propeller Weight   1.92oz / 54.4g Direction of rotation   Normal / Tractor Material   Glass Fiber R Composite Color   Black   * prepared for versatile shaft diameters. For more information check the shaft diameter guide  here