MASTER AIRSCREW 16 X 8 PROP K SERIESRobust propeller for glow engines 1.2cc through 2.11cc. Unique scale look for WWI and WWII Model Aircrafts. Available in sizes 16" to 20". Crafted from Glass Fiber Reinforced Composite. Propeller diameter 16" / 406mm Propeller pitch 8" / 203mm Hub thickness 3/4" / 19.1mm Shaft diameter 5/16" - 3/8" / 7.94mm - 9.53mm * Propeller Weight 3.35oz / 95g Direction of rotation Normal / Tractor Material Glass Fiber R Composite Color Black