Type: Seamless Boiler and Heat Exchanger Tube Material Grade: ASTM A210 Grade A1 Size: OD 51mm WT 6.3mm Length 8.5 meters Surface Treatment: Oil Coating, 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.