Product Name: Malleable Iron Flange
Sizes: 1/8"-6"(DN6-DN150)
Finish: Black, Hot Dipped Galvanized, Electro Galvanized
Materials: ASTM A-197, ASTM A47, BS EN1563
https://www.hbsinostar.com/pipe-fittings/malleable-pipe-fittings/malleable-iron-flange.html