1) Pultruded Square Carbon Fiber Tube - 5mm x 5mm x 1000mm - CarbonKevlarSupply.com
TUBO FIBRA DI CARBONIO 8mm,12,5mm,18mm.25mm,30mm,40mm,50mm OD | eBay
Amazon.com: Carbon Fiber Tube 5mm OD x 3mm ID x 200mm Matt Tubes Rod (4 PCS) for RC Aircraft/kites/Quadcopter/Multicopter : Industrial & Scientific
Asta in fibra di carbonio solida 1MM 2MM 3MM 4MM 5MM 6MM 7MM 8MM 9MM -18MM (500MM) asta di rinforzo peso leggero ad alta resistenza per fai da te - AliExpress
Amazon.com: 5MM Carbon Fiber Tube 3mm x 5mm x 430mm Round for Quadcopter Multicoptor Frame Body Landing Gear 5PCS : Toys & Games
4) Piece - 5mm x 3mm x 1000mm Carbon Fiber Tube - Pultruded Round Tub - CarbonKevlarSupply.com