Product Item: Boiler Tubes, Heat Exchanger Tube
Material: ASTM A179, Seamless Carbon Steel
Size: 3/4 Inch, DN20, 19.05 mm
Wall Thickness: 2.11 mm
End: Plain
Surface Treatment: Black Treatment
Source: https://www.landeepipe.com/astm-a179-boiler-heat-exchanger-tubes-wt-2-11-mm-3-4-inch.html