30 Sets of Stainless Rabbit Nipples Gravity Feed W/Adjustment Tool 30 Stainless plated Rabbit Nipples, 30 Black Tees, 30 Springs & 1 adjustment tool Recommended for a Gravity Feed System Each Nipples can handle up to 3-5 rabbits or small mammal Nipples have built on rounded cage clip design and can be adjusted with a 5MM Allen Key Will attach to almost any wire cage