Sharkbite, 1/2" x 1/4" Compression Quarter Turn Straight Stop Valve, Controls Water Flow To Household Plumbing Fixtures, Straight Stop Valve Connects To Incoming Copper, PEX, Or CPVC & Allows For Easy Shut Off Of Water Flow To The Fixture, Push Fit Outlet Can Be Used With Grey Pox Tubing To Connect To Your Fixture.