This 70mm diameter drinker is designed for bird cages and enclosures with welded mesh or metal rod designs. The universal adapter clamps on to either side of the mesh or cage side, creating a sturdy attachment. Water is supplied from a gravity fed source, for example a water trough stored above the cage with a hose run to the drinker's adapter. These drinkers are easy to clean and can be added to cages in any quantity required. Simply add more hose and t-connectors!