Stainless Steel Nipples Gravity Feed Watering Starter Kit Will work for Rabbits, rats, chinchillas, Ferrets, and more.Nipples are Stainless Steel and come apart easily to clean or to fix. Kit Includes 10-Stainless steel Nipples - 3/16” plastic tees10 - stainless cage clips 1 - bucket connector with a brass barb, 50’ of 3/16” food grade tubing. this starter kit will give you everything you need to start a gravity feed watering system except the bucket. for more information on how a gravity fed system works please do your own research. Youtube in a great way to get information to help you understand more.