We specialize in 20# Seamless Pipes and Rectangular Tubes, 45# Seamless Pipes and Rectangular Tubes, Q345b Seamless Pipes, Square and Rectangular Tubes, Q345d Seamless Square Pipes, Q235b Rectangular Pipes, 16mn Rectangular Tubes, 16mn Seamless Rectangular Tubes, Stainless Steel Rectangular Tubes, and Hot-Dip Galvanized Rectangular Tubes, among other Seamless Steel Pipe products. The specifications and dimensions of the rectangular tubes include: 20*20 to 600*600 square tubes, 20*30 to 400*800 rectangular tubes, thickness ranging from 0.6mm to 28mm, with over 100 specifications available. Materials include Q235 Rectangular Tubes, Q345 Rectangular Tubes, 20#, 45#, Seamless Pipes, and Alloy Steel. Our company has 5 precision rolling production lines, capable of custom-making various seamless precision pipes and bright pipes according to customer requirements.