Description: Size and Shape: rounded tube with outside diameter, inner diameter, overall length. Lightweight: strong as metal but only one fifth in weight, corrosion-resistant and heat-resisting. Smooth Surface: made of high tensile carbon fiber, glossy surface with a polishing finish. Application: carbon fiber wing tube is used for racing drones, RC helicopter wing, RC airplanes and RC sailboats, kite spars. Features:Tube Shape: Circular PipeOutside Diameter:Inner Diameter:Overall Length:Finish Type: PolishingPackage Content:Carbon Fiber Tube