Dear Sir/Madam, Have a nice day! This is Amy from Tianjin Guangxin Iron And Steel Industrial & Trading Co.,Ltd Guangxin,18 years experience manfacture for steel pipe, We specialize in the production of ERW pipe, Galvanized pipe, Square & Rectangular Tube, Special-shaped pipe, specifications are 20×20mm - 1000×1000mm, wall thickness of 1.0mm - 40mm. If you have any concerns, pls contact me directly anytime. Best regards for you. Amy

WeChat: Munian05 E-mail：amy@gx-steelpipe.com Tell:0086-87938177 0086-83788015 Web:https://www.tjgxgt.com