This is a Master Airscrew Injection-Molded Fiberglass Filled Nylon Propeller. / Excellent for Any Type of Application, from / Training and Sport Flying to Serious Competition. / / FEATURES: NASA Airfoils and Constant-Pitch Designs enable this Propeller to / deliver more Thrust at Lower RPM. / The Latest in Engineering Technology used for this Updated Design. / Lower Noise and Accurate Balance / Available in a Wide Array of Sizes to Suit Every Application. / Propeller is totally fuel-proof. / / INCLUDES: One Black 10x6 Fiberglass/Nylon Propeller / / SPECS: Center Hole Diameter: 1/4" approx. / Propeller Diameter: 10" / Propeller Pitch: 6" / / REQUIRES: Depending on the engine crankshaft size, the propeller may need to / be reamed to a larger size using GPMQ5005 (SAE) or / GPMQ5007 (Metric).