Package contents: 12 pieces of coffee maker water filters, providing enough supply for ongoing use and replacements. Key benefit: filters impurities in water to create a safer drinking environment and protect your coffee maker. Material and filtration performance: made of quality charcoal with a micromesh design; effectively filters sediment, impurities, scale, and sand to keep water clean and improve coffee flavor. Size and compatibility: each filter measures 5.4 x 3.5 x 3 cm; suitable size for many coffee makers. Please confirm the size fits your device before . Easy to install: simple to install or remove with no tools required, enabling quick replacement and continuous filtration of pollutants. Use scenarios: Daily home coffee brewing for cleaner water and better taste. Office or breakroom use to maintain water quality between filters. Travel or camping in areas with hard water to improve coffee flavor on the go.