【High-efficiency filtration】Made of high-quality materials such as natural coconut shell activated carbon and ion exchange resin, tested by a third-party laboratory, it can effectively reduce chlorine, rust, scale and sediment in the water, ensuring maximum purity of drinking water and improving the taste of water. 【Long service life】The filter has stable and long-term filtering performance. To ensure effective filtration, it is recommended to replace the filter element when the capacity filtration reaches 150 liters. [Good Compatibility] This filter can be installed very easily without tools. The filter is well designed and compatible, allowing you to easily enjoy soft water. [Compatible Models] Compatible with espresso machines with filters СA6903/00, CA6903/01, CA6903/99, CA6903-00, CA6903-01, CA6903-99, CA6903. 【Filter Replacement Reminder】The visible time window on the cap allows you to monitor the filter life in real time and remind you to replace it in time. Note: Soak the