Abester 3K Carbon Fiber Tube ID 4mm x OD 6mm x 1000mm Glossy Surface Pipe Roll: Amazon.com: Industrial & Scientific
12mm x 10mm & 10mm x 6mm (Length:1000mm) Carbon Fiber/Fiber 3K Roll Wrapped Sliding Pair Tube
Rolling Process Carbon Fiber Tube 8000mm Custome Made Large Diameter Carbon Fiber Tube for Industry High Quality - China Carbon Fiber, Tube | Made-in-China.com