The seamless steel pipes we can supply are as follows:Outer diameter: 10-610mmWall thickness : 2mm-18mm The standard we can supply are as follows:1 ASTM: A106, A53, A179, A178, A135, A252, A282, A283, A226, A210, A333, Grade A & B, API5L2 JIS: G3454, G3461, G3455, G3456, STPY41, STB35, ST423 DIN: DIN17175, DIN27911, ST52, ST35.8, ST37, ST45, ST424 GB: T8162, T8163, T 3087, Specification: 3/8"-24", wall thickness: SCH10-SCHXXSIf you are interested in any kinds of seamless steel pipes of ours, please contact me with details.And the information should include the outer diameter, wall thickness, length, material, quantity for per specification and other requirements of yours.Best wishes,Miss gao,