This universal check valve for water dispensers is designed to ensure one- flow, maintaining . Crafted from sturdy plastic, it is built to last and withstand daily use. Its easy installation and compatibility with various water purification systems make it a practical and essential component for any water dispenser setup. Features -Color:White -Material:Plastic -Size:5.00X2.30X2.30cm/1.97X0.90X0.90in -Hole diameter: 12.5 mm. -Efficient back-flow prevention: the -way check valve ensures no water back-flow, maintaining the purity of your water dispenser and promoting user health -Leakage-free solution: this accessory effectively addresses water dispenser leakage problems, preventing water wastage and providing a worry-free user experience -Broad compatibility: compatible with various water dispenser brands and models, it is proper for use in homes, offices, schools, and retail environments, meeting various needs -Robust and reliable: made from excellent materials, it is resistant to damage and wear, ensuring performance and reliability -Simple installation: the accessory is easy to install, requiring just a few steps, eliminating the need for professional help and saving time and money Package list: 2 x check valve