The 2 X 1Red Coupling Fitting End X Copper is a specialized plumbing fitting used to connect two copper pipes of different sizes, allowing for a smooth transition between a larger pipe fitting and a smaller copper pipe. It features a fitting end (FTG) that fits inside another copper fitting and a copper sweat/solder end (C) that fits over a pipe. This design ensures a strong, leak-proof connection, making it ideal for plumbing, HVAC, and gas distribution systems.