This is the Main Gear for use on the / Heli-Max Novus FP Micro 2.4GHz RTF (HMXE0802). / / FEATURES: Nylon construction / Black in color / / INCLUDES: One Main Gear / / REQUIRES: Installation on the helicopter / / SPECS: Outer Diameter: 35mm (1.4") / Width: 1.6mm (0.06")