the length is   40mm       ;     the width   is 40mm   Tianjin Fushun Steel Pipe Co., Ltd. is located in Tong Jinghai County of Tianjin Industrial Park Daqiuzhuang territory, is a professional production of square tubes, rectangular tube, galvanized square tube processing, hot dip galvanized rectangular tubes, square tubes of large diameter, export processing hit boxes, etc. of the integrated enterprise. I am in the steel industry has a high reputation, inventory and more. The company has advanced production level, all with computer control of production, with a high-frequency welding cold forming technology, direct prescription cold-formed steel welded pipe equipment, and multi-function devices. I am using the Q195-Q235-Q235B-Q345 material, surface galvanized hot-rolled production process, a small part of the production process using cold-rolled type. Our company has passed ISO9001: 2000 quality system certification, quality testing is complete.The user is supreme, the quality first, the good faith for this, the pragmatic realistic----this our promise