There are specific installation steps above, you can watch carefully before installation, to ensure your efficiency. Dimension of drinker Total height: 20 .Width of bottle: 6.5 . Base length: 15. Base width: 7.3. Water bottle capacity: 500ml. Installation dimension Buckle diameter: 5.5 Screw diameter: 1.7. Proper Cage Dimension Internal Installation: Wire spacing is greater than 1.7 and less than 5.5. External Installation: Wire spacing is greater than 2.5 and less than 5.5. Christmase:Please understand the size before purchasing, if you want to install it on cages. Easy installation This rabbit bottle can be fixed with these buckles in two sides of the cage.The rabbit bottle has a fixing ring to prevent it from tipping over or collapsing. At the same time, the bottle for rabbit also can be placed directly on the ground. Fixing design Guinea pig waterer uses durable anti-aging screws and nuts, plastics solid technics and hangs more firmly on the cage and is Christmas easy to slip.