steel tube used in Chair frame assembly parts 1.Material:steel tube 2.Finish:power coating 3.Tolerance:0.5-1mm steel tube used in Chair frame assembly parts Production Description Haiyan Hongtai Metal Products Co.,Ltd.We can produced by your drawing, samples or description. Can be customized OEM1) material: Carbon steel , galvanized sheet, stainlesssteel 304 2) surface treatment:Zinc , powder ...