For assembly carbon fiber tubes with kits, we designed and produced aluminum clampes for carbon fiber tubes. They are made of 6061-T6 aluminum material and plastic. Both are popular. Our standard sizes are 12mm,16mm,20mm,22mm,25mm,30mm. Round tube clamps,octagonal clamps,moveable clamps etc are available. If you need other size,material or shape, we could cutomize them for you according to your requirements. Please send us an RFQ with your specificationns if you need customize them. We could produce or customize them to fulfill your unique needs.