They are quick, tight, leakproof connections to pipe, tubing, hose or tanks and provide quick liquid and material hose connections that seal tight and stay tight. Sizes from 1/2" to 8" are available. They are made of aluminium alloy, brass, stainless steel and other metals for use with liquids, vapors, gases and air-blown dry products. Suitable for use with single connections and where changes in connection to a number of tanks or outlets may be required.