Standard:API SPEC 5D Size:OD(mm):168.3 Wall Thickness(mm):8.38-9.19 Length:5m-12m End protection:Plastic caps Steel Grade:E--75,X--95,G--105,S--135 Common Tread Type:IF,FH,REG,NC,etc Outside Coating:Black painting, anti-corrosion oil, galvanized or as per required by customers Marking:Standard marking, or according to your request. Advantages:Reasonable price with excellent quality.Abundant stock and prompt delivery;Rich supply and export experience,sincere service Packaging:Wrapped in bundles by steel strips/bulk Date of Delivery:Shipped in 10 days after payment Port of Shipment:Tianjin Port,Tianjin, China