Buna | Compression Coupling | Hex Reducer Bushing | Hex Reducer Bushings | Insert Coupling | MIP x NST (NH) Adapter | Reducer Coupilng | 1-1/2" x 1-1/4" | 1-1/2" | 1/2" x 3/8" | 3" x 1" | 3" x 1-1/2" | 5" x 3"