Product Name: Epoxy Coated Ring Spacer Flange
Design Standard: ANSI Standard
Material: ASTM A105, Forged Carbon Steel
Size: 12 Inches, DN300
Pressure Rating: Class 300 LB, PN50
Surface Treatment: White Epoxy Coating
Applications: Oil Field, Offshore, Water System, Shipbuilding, Natural Gas, Electric Power, Pipe Projects

Source: https://www.landeeflange.com/epoxy-coated-ring-spacer-flanges-astm-a105-12-in-cl300-lb.html