ARRIS 25mm 23mm x 25mm x 500mm 3K Roll Wrapped 100% Carbon Fiber Tube Matt Surface (2 PCS) 3K Pure Carbon Fiber, use for RC Quadcopter, Multicopter, Helicopter and Airplanes. Length: 500mm Outer Diameter: 25mm Inner Diameter: 23mm Package Includes: 2 pcs x 23mm*25mm*500mm carbon fiber tube (Matt Surface)