Features: 1.Made of plastic material, good toughness, good pressure resistance. 2.The bird feeder can be automatically filled with water and has a fixed screw buckle to facilitate large-scale farming. 3.Water volume can be manually adjusted. 4.Suitable for almost all kinds of birds. 5.Easy to install, offer you tubes for easy installation. Specification: Item Type: Bird Drinking Cup Material: Plastic Color: as picture shown Size: approx. 9x6.5x4.5cm/3.5x2.6x1.8inch Weight: approx. 193g Installation and use method: 1. Just hang the water bowl on the cage, and then connect it to the water tank with a plastic water cup. The water pressure should not be too large. 2. Filter the water outlet of the water tank to keep the water clean. 3. Water fountain insert plastic pipe should be firmly, the plastic pipe should not be too tight, should grow 2CM to prevent contraction. 4. In the process of use, it is better to wash once every 1-2 months to extend the service life. PackageList: 12 x Bird Drinking Cup12 x Tube