Features:

• Auto-Fill Water Cups: Metal cups automatically refill with fresh water every time your animals take a drink. It stops filling when the cups reach 3/4 full to avoid spillage and keep your animal cages dry
• Chew-Proof Metal Cups: Unlike plastic cups that end up as chew toys, metal cups are less likely to damage and last longer. Works great for rabbits, guinea pigs, chinchillas, mice, rats, ferrets, hamsters, hedgehogs, and other small animals
• Easy Installation: Metal drinking cup easily attaches to any container using a 3/8 drill bit. The System must be gravity-fed or have a pressure below 3PSI to work properly
• Compatible with: 5-gallon buckets, PVC pipes of any size, 5/16" ID and 7/16" OD tubing - Not included, sold separately
• What's in the Box: Each DIY waterer kit includes six metal drinking cups with attached elbows and cage clips, six washers, six wingnuts, and instructions