[Filtration Precision up to 1 Micrometre]: This filter element uses high-quality coconut shell activated carbon as the filtration medium, providing a filtration precision of up to 1 micrometre. It effectively removes impurities such as sand, rust, sediment, and odors, while reducing chlorine and achieving a chlorine removal rate of over 99%. [Compatible Models]: This filter is compatible with gravity filtration systems including Travel, Grand, Royal, Imperial, and Crown Series. The precisely designed washers and wing nuts ensure a secure fit and prevent leaks. No primer required—simply install and use after replacement, minimizing initial flushing. Designed for reliable performance without flow restrictions. [Durable Lifespan]: For optimal performance and extended system life, replace the filter every 6,000 gallons (subject to inlet water quality). To maintain proper siphoning in drip systems, fully submerge the carbon filter at least once per week. [Afable and Cost-Effective]: Achieve high-performance filtration comparable to leading brands at a more afable price. Enjoy clean, filtered water without compromising on quality or value. [Note]: Before installation, soak and rinse the filter thoroughly to remove any residual manufacturing particles. Color: Black Material: Coconut shell activated carbon Package Contents: 4 x Water purification filter elements Please note: The actual product may vary slightly in color due to lighting and monitor settings. Measurement tolerance: +/- 1–3 cm.