4Pcs Water Drinking Cups Chicken Automatic Poultry Drinkers Hen Bucket Waterer Feature: 1: Drinker/Fitting combinations can be used to expand an existing watering system or can be attached to a bucket or barrel to create a gravity fed waterer. 2: Backyard Flock Drinker Cups are an innovative way to provide always-fresh water to your flock. 3: As a bird drinks the spring-loaded tab is bumped releasing more water into the cup. 4: Filled Automatically when birds peck at the built in plunger. Specifics: Condition: 100% Brand New Material: ABS Plastic Color: Red Quanlity: 4PCS Compatible: Standard 25mm PVC Water Lines Note: 1.Please allow 1-3mm difference due to manual measurement. 2.All fittings are compatible with standard 25mm water lines. Package Included: 4x Water drinkers