8" x 3.5", 1/2" PEX (F1807) inlet, spin closed. 1/2" copper pipe size. Features a square O-strap (ear) with pre-drilled holes for mounting purposes. Used for transition between PEX tubing and copper pipes to stub out of the walls or floors. Spin closed outlet allows for pressure testing before installation of stop valves and prevents dirt and debris from getting inside the pipes during construction.