Couplings | Compression Coupling | Blind Flanges | Hex Reducer Bushing | Hex Reducer Bushings | MIP x NST (NH) Adapter | Reducer Coupilng | 1-1/2" x 1-1/4" | 1-1/2" | 3" x 1" | 3" x 1-1/2" | 4" x 3" | 5" x 3"