Detailed Selling Lead Description Features: 1. All tube are made by high tensile steel at 48.3 x 3.2mmT. 2. The wall thickness is available at 2.5mmT, 3.0mmT, 3.2mmT and 4.0mmT 3. The ring part is available at 8mmT and 10mmT 4. Finish: H.D.G only 5. OEM service offered.