SharkBite quarter-turn full-port brass ball straight stop with a 1/2 in. push-to-connect inlet and 3/8 in. compression outlet, in a chrome finish. Controls and shuts off water flow to fixtures and appliances for maintenance and repair, typically on stub-outs coming out of the floor. Works with PEX, copper, CPVC and PE-RT pipe. No special tools, crimping, glue or soldering needed, and it can be installed in wet lines. Remove with a disconnect clip or disconnect tongs (sold separately).