Size: 1/2"-72" Thickness: SCH20-XXS Material: carbon steel (seam & seamless) Qualification: ISO9001, API, CE, Size:from 1/2" to ... 2616 DIN 2617JIS B2311 JIS B2312 JIS B2313Material:carbon steel (seam & seamless)Qualification: ISO9001, API, CE,Packing:wooden cases & palletsSpecial design ...