1.LENGTH: 2-12M 2.SIZE:15*15MM--1000*1000MM 3.THICKNESS:0.5-16MM 4.Q195, Q235, Q345, ECT 5.SURFACE: ... specifications ranging from 15mm*15mm to 170mm*170mm and wall thickness ranging from 0.5mm to 16 mm, and hot dipped ... you . Commoditylarge diameter galvanized welded steel pipeTyperound, square, rectangularWall thickness0.45-4.75mmLength5800mm ,6000mm,or as the request of customersOutside diameter8 ...