Bauyer Coupling Material: Steel Size: 2" ,3", 3-1/2", 4", 6" ,8' Bauyer Coupling Nominal size Steel2" HX-Steel Bauer Couplings3" HX-Steel Bauer Couplings3-1/2"HX-Steel Bauer Couplings4"HX-Steel Bauer Couplings6" HX-Steel Bauer Couplings8" HX-Steel Bauer Couplings Bauyer Coupling