This is the replacement Propeller and Prop Adapter for the / Hobbico Flyzone Beechcraft Staggerwing RTF 31" (HCAA27**). / / FEATURES: Black Nylon Propeller / Aluminum Prop Adapter / / INCLUDES: One Propeller / One Prop Adapter / / REQUIRES: Mounting hardware used from kit / / SPECS: Prop: Diameter: 8" Prop Adapter: Total length: 33.5mm (1.32") / Pitch: 6"