When the chicken pecks the trigger, the chicken drinker valve will automatically release the water into the plastic cup. The chicken drinker cups can be easily installed in the side or bottom of a bucket. This type removable chicken water drinkers is easy cleaning and replacement, always provide fresh and clean water to your poultry. Item Name: Drinking Bowl Material: ABS, Resin, Polypropylene Features: Durable, Convenient, Eco-Friendly Bowl Size: Length:8cm/ 3.15" (Approx.) Diameter:5cm/1.97" (Approx.) Height:3.5m/ 1.38" (Approx.) Notes: Due to the light and screen setting difference, the items color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement. Packing Includes: 4 x Drinking Bowls 4 x Three-way Adapters 4 x Black Nuts