Wall thickness: Sch5-Sch160,XXS 4.Standard: ISO, SNSI, JIS, DIN, GB/T12459,GB/T13401,ASME B16.9.SH3408 SH3409, HG/T21635,HG/T21631,SY/T05010 5.Material: A234-WPB.A420-WPL6.A234-WP12.A234-WP11.A234-WP5. and so on. 6.Special design available as the requirements of customer 7.Packing : wooden cases & pallets 8 Good quality and price concessions