Product Name: Hot-Dip Galvanized Bauer Coupling, S73
Type: Bauer Coupling with Socket
Material: Carbon Steel
Size: 3 Inch, DN80
Surface: Hot-Dip Galvanized
Connection End: Flanged

Source: https://www.landeepipefitting.com/hot-dip-galvanized-bauer-coupling-s73-carbon-steel-3-inch.html