[Filtration precision up to 1 Micrometre]: For excellent filtration performance, this filter element uses high-quality coconut shell activated carbon as the filter material, with a filtration precision up to 1 micrometre. Efficiently removes impurities such as sand, rust, sediment, and odor, while effectively reducing residual chlorine with a removal rate of more than 99%. [Compatible Models]: This filter is compatible with gravity filtration systems including Travel, Grand, Royal, Imperial, and Crown Series. The precision design of the washers and wing nuts ensures a secure connection and prevents leakage. No primer required; it can be installed and used after replacement, reducing initial flushing requirements. [Durable Lifespan]: To extend the life of your system and maintain optimal performance, replace the filter every 6,000 gallons (depending on tap water quality). Ensure the carbon filter is fully submerged at least once a week for proper siphoning in drip systems. [Cost-Effective]: These filters deliver comparable filtration and performance to leading brands at a more afable price. Enjoy high-quality water filtration with cost efficiency. [Note]: Before installing the filter, soak and rinse thoroughly to remove residual manufacturing dust. Color: Black Material: Coconut shell activated carbon Package Contents: 4 x Water purification filter elements Note: Light reflection and different displays may cause the color of the item in the picture to appear slightly different from the actual product. Measurement may vary by +/- 1-3 cm.