1). Size: 25mm*25mm-250mm-250mm 2). Wall thickness: 1.5mm-25mm 3). Length: 1m-12m 4). Grade: Q195, Q235, Q345,SS400,SS540, S235JR, A36 etc 4). Certificate: ISO 9001-2008 5). Packing: Standard exporting package. 6). Delivery: Within 20 days after receiving the deposit. 7). Application: Framework of all kinds of construction and engineering; Construction joint ;Iron tower; Derrick frame ; Building structures, such as beams, bridges, transmission towers, lifting or transporting machines, shipping, industrial boilers ,product according to your needs.