Quick disconnect fuel couplings add convenience and ease of use. Simply press the thumb latch and the two halves separate. Connection is just as easy just press the two halves together. Viton o-rings for a leak free connection. Can be used with any type fuel. Will work with 1/4" I.D. fuel line. Duel shut off valve, closes on each side when disconnected. Will not work with fuel injection systems. Will not work on systems with any pressure.