1) Material: Stainless steel composite pipe (External Layer: Stainless Steel, Internal Layer: Carbon Steel). 2) Diameter & Thickness: Φ22.2*1.8, φ25.4*1.5. 3) Our parts is fit for the motorcycle model AX100 CG125 WY125 GS125 CD110 DY100 GN125 GBT125 SJ110 FD110, etc. 4) Import/Export right have already obtained. So we can export our goods to abroad by ourself.