Libra Supply 3 x 2 inch(Nominal Size) Copper Coupling Bell Reducer, C x C, (click in for more size options), 3'' x 2'', 3 x 2-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: 3-1/8'' x 2-1/8'' (OD 3-1/4'' x 2-1/4''), Fitted Pipe ID Size: 3'' x 2" (OD 3-1/8'' x 2-1/8'')