quality activated carbon filtration: Specially formulated with grade activated carbon fiber to remove impurities, calcium, and other unwanted elements from water, providing a cleaner base for your coffee. Compatibility: Designed for ES601, ES655, and ES701 coffee machines. These replacement filters work with various singleserve coffee makers to maintain brewing performance and flavor. Enhanced coffee experience: Eliminates up to 97% of impurities and reduces unpleasant smell, allowing the true flavors of your coffee to shine through without interference from calcium or other water contaminants. Machine protection and longevity: Regular use reduces limescale buildup in your coffee machine, extending its lifespan and helping maintain a consistent brewing temperature for better extraction. Use scenario: In homes with hard or mineralrich water, install these filters to improve coffee taste and protect your machine from mineral buildup. Use scenario: In households or small offices using multiple ES601/ES655/ES701 machines, use these filters to maintain consistent performance across devices. Use scenario: As part of a regular maintenance routine to minimize limescale and prolong the life of your coffee equipment.