Libra Supply 1/2 x 3/8 inch(Nominal Size) Copper Pressure Coupling Bell Reducer, C x C, (click in for more size options), 1/2'' x 3/8'', 1/2 x 3/8-inch Copper Pressure Pipe Fitting Plumbing Supply Provides a reduced socket size for aboveground water supply piping Copper construction C x C copper to copper connection type Solder connection required Fitting ID Size: 5/8'' x 1/2'' (OD 3/4'' x 5/8''), Fitted Pipe ID Size: 1/2'' x 3/8" (OD 5/8'' x 1/2'')