[Efficient Filtration] Made from high-quality materials such as natural coconut shell activated carbon and ion exchange resin, this filter can effectively reduce chlorine, rust, limescale and dirt. deposits based on tests carried out by a third-party laboratory, ensure the purity of drinking water to the highest degree and improve the taste of water. [Long life] This filter has a long and stable filtration performance. To ensure effective filtration, it is recommended to replace the filter when the filter capacity reaches 150 liters. [Good compatibility] This filter is very easy to install, with no tools required. With its exquisite design, this filter has good compatibility and allows you to enjoy fresh water with ease. [Compatible Model] Replacement for espresso machines with Aqua Clean filter A6903/00, CA6903/01, CA6903/99, CA6903-00, CA6903-01, CA6903-99, CA6903 cartridges [Filter replacement reminder] Visual time window on the cap allows you to monitor the duration filter life in real time and remind you for quick replacement. Note: Before use, soak the filter in water to ensure that the filter is completely submerged in water for a few minutes until there are no more bubbles.