Copper stub-out elbows with F1960 style expansion connections. Used to stub out of the wall and provide transition between PEX-a pipe and copper pipe, to facilitate connection of compression or sweat outlet stop valves, tub spouts, etc. For use with PEX-a tubing only (Uponor/Wirsbo hePEX & AquaPEX, Rehau, Mr. PEX, Sioux Chief, etc.).