Product Name: ASTM A105N Blind Flanges
Design Standard: ASME B16.5
Material: ASTM A105N, Forged Carbon Steel
Size: 12 Inch, DN300
Pressure: Class 900 LB, PN150
Sealing Facing: RTJ Face
Surface Treatment: Anti-Rust Black Coating
Source: https://www.landeeflange.com/astm-a105n-blind-flanges-carbon-steel-12-inch-900-lb-rtj.html