1-1/2in x 3/8in | Blind Flanges | Compression Coupling | Coupling | Gap-a-lets | Hex Reducer Bushings | MIP x NST (NH) Adapter | Reducer Coupling | 1-1/2" x 3/8" | 1" | 2" x 1-1/2" | 4" x 2" | 8" x 8"