This is an optional Lynx Heli 180CFX Lightweight Carbon Fiber Main Frame Panel. The Lynx Heli Lightweight Main Frame opens the door to a higher level of more precise and crisp flight performance, as well as increased frame space for extra electronics or easy maintenance. Features: Fully compatibility with 180CFX standard Heli Lightweight design. Easy assembly and maintenance. Specifications: Carbon Fiber Material: 3K Carbon Fiber ? 1.0 mm Thickness Weight: 7.5g full set (2 pc) Includes: (2) 180CFX - Lightweight CF Main Frame