1)motorcycle part 2)material:carbon steel Q195~Q235 3)accept OEM order ... not rust.3) Tube size:diameter 25.4mm,Thickness(1.2mm,1.5mm,1.8mm,2.1mm).4) Thickness tolerance of steel pipe ... ,JianShe,Xinyuan,ZongShen,Longxin,Suzuki,DaYun,and etc. produce motorcycle part ( goods shelf)