Features 1. Made of high quality materials for durability, safe to use. 2. Contains 4 filter elements and 4 check valves. 3. It is recommended to replace every 6 months. 4. Easy to install, easy to replace, just need to simply disassemble and replace. Specification Material: Plastic Color: Blue, White Size: Filter Element: 9.52 cm, Check Valve: 9.15 cm Weight: 110 g Package Include: 4 x Filter Elements 4 x Check Valves When shopping, please pay attention to the size and dimensions of the product to ensure that it meets your needs. In the title and , we have provided detailed information about the product, including its features and specifications We want you to be completely satisfied with your purchase, so if you have any questions or concerns, please don't hesitate to contact us. We are here to help and will do our best to assist you. Thank you for choosing our product. We hope you enjoy it