Finest Wood Propellers Specially engineered, made of high quality beech wood in sizes 9" through 16" and of maple wood from 18" through 24". The Wood Series is similar in performance and style to the G/F and K Series propellers for Model Airplanes. Propeller diameter 10" / 254mm Propeller pitch 7" / 178mm Hub thickness 7/16" / 11.1mm Shaft diameter 1/4" / 6.35mm Propeller Weight 0.48oz / 13.6g Direction of rotation Normal / Tractor Material Beech Wood Color Wood