Add a Quick Connect Drink Tube Connector to your hydration system for convenient drink tube coupling and bladder loading. With Mazama's Quick Connect fittings you can easily disconnect your reservoir from your drink tube for fill-up while leaving your drink tube on your pack. The female side of the Quick Connector features an auto shut-off so water won't flow out of the tube until it is reconnected. Fits tubing with an inner dimension of 5/16". Box includes two complete sets.