A complete quick-disconnect fitting consists of a body and an insert (order fitting halves separately). Plus insert into coupling body to connect -- fitting halves lock into place immediately. To Disconnect fitting halves, simply press the button on the coupling body. Valves models have a spring-operated 316 SS Valve that seals the flow path when fitting halves are disengaged. All fitting bodies have 316 SS latch springs and EPDM seals.