Liquid Corny Ball Lock Disconnect - MFL
This is a black disconnect that you snap on to the liquid post of ball lock corny kegs. It is MFL threaded for easy connection to 1/4" flare fittings. This is a great disconnect to use if you switch lines a lot or alternate between serving homebrew and commercial beer. Don't forget a swivel nut.
Remember, black disconnects for beer, grey disconnects for gas.