1Excellent Material: The material is engineering grade Asa material, it's not easy to turn yellow, and durable. The diameter of the gravity water inlet is 40mm, and the filling speed is very fast. 2Water Protection: The rubber dust cover prevents dust from entering, which keeps the water clean and hygienic. And the product is lockable,equipped with 2 keys to ensure water safe. 3Special Design: The water tank vent has its own exhaust port to prevent the water tank from forming a vacuum and unable to add water. 4Magnetic Design: The product has a magnetic buckle lid, gently covering it, it can be stable and firm, not easy to loose. 5Easy Installation: The outer cover has a logo of faucet for easy identification. You can easily complete the installation work without any professional guidance.