Use these super high quality, food-grade, quick-disconnects on your beer or gas line. Uses might include the following: * On a gas system to unhook your tank and regulator from your manifold so you take it with you. * On a beer line to easily switch between ball lock, pin-lock, or a commercial tap * On a counter-pressure bottle filler to be able to easily connect to your existing gas line. These quick disconnects feature 1/4" barbed fittings which can be used with either 3/16", 1/4" or 5/16" line. The quick disconnect functionality is activated by a shrouded thumb latch. The temperature range is -40F to 180F. They can handle a vacuum to 120 psi - so you need not worry about them leaking gas. The internal valve spring is 316 type stainless steel and the o-ring is food grade buna-n.