Type: Boiler Tube. Material Grade: SA213 T23. Manufacture Method: Cold Drawn. Heat Treatment: Normalized. Size: 51mm x 9mm. Surface Treatment: Black Painting/Oiled. Application: For Heat Exchanger. Packing: In Bundles or as Your Requirements. Payment Terms: TT/LC, West Union, Paypal and O/A. Delivery Time: 7-25 Days after Receiving the Deposit.