Coupling (or coupler) (used in piping) is a very short length of pipe or tube, with a socket at one or both ends that allows two pipes or tubes to be joined, welded(steel), brazed or soldered (copper, brass etc.) together.
Couplings are used to joint two the same size tubes together.
We offer varieties of size ranging between 1/4" and 4 1/8” (measured in Inner Diameter-ID)