Product Name: Hot-Dip Galvanized Bauer Coupling, S70
Type: Bauer Coupling with Ball
Material: Carbon Steel
Size: 3 Inch, DN80
Surface: Hot-Dip Galvanized
Connection End: Flanged

Source: https://www.landee.cn/hot-dip-galvanized-bauer-coupling-carbon-steel-s70-3-inch.html