Type: Seamless Alloy Steel Pipe Standard and Material: ASTM A335 GRADE P11 Size: 4IN SCH80 20FT LG Surface Treatment: Acidpickling, etc. Application: Used in Boiler and Heat Exchanger etc. Packing: In Bundles Case or as Your Requirement. Payment Terms: TT/LC, West Union, Paypal and O/A. Delivery Time: 7-25 Days after Received the Deposit.