The Lixit Glass Water Bottle has a medium nozzle measuring 7/16" is designed for hookbill birds such as Conures, African Greys, Quakers, Senegals, and Amazons. Can be used for other animals such as rabbits, ferrets, guinea pigs, chinchillas, and small dogs. This kit contains steel mounting bracket and holder and easily attaches to wire cages with mounting hardware that makes it easy for quick refilling and cleaning. Keeps water fresh and clean from debris. Made with a stainless steel tube and non-toxic, USDA approved rubber stopper.