1/4 in. Barb x Male Shut-Off Beer & Gas Quick ConnectThese 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. For the female side, see our H550B.