We specialize in 20# seamless pipes and rectangular tubes, 45# seamless pipes and rectangular tubes, Q345b seamless pipes and square tubes, Q345d seamless square pipes, Q235b rectangular tubes, 16mn square tubes, 16mn seamless square tubes, stainless steel square tubes, and hot-dip galvanized square tubes, among other seamless steel pipe products. The specifications and sizes of rectangular tubes range from 20*20 to 600*600, and for rectangular tubes, from 20*30 to 400*800. Thickness ranges from 0.6mm to 28mm, with over 100 different specifications available. Materials include Q235 square tubes, Q345 square tubes, 20#, 45#, seamless pipes, and alloy steel. Our company has 5 precision rolling production lines and can custom make various seamless precision pipes and bright pipes according to customer requirements.