Our company can provide you ERW black plain end steel pipe with the following standard: ASTM A53 A sch40, BS1387 light class and meuium class, EN39 and DIN2444, size from 1/2 inch to 4 inch, with length of 18ft, 21ft, 24ft or according to customer's requirement, Used for structure and steel fence. Welcome your enquiry Appearance: Black steel pipe Sizes : O. D.: from 1/2 inch to 4 inch Wall thickness : according to ASTM A 53 SCH40, EN 39, BS1387 and DIN 2444. Length: according to customer's requirement