[Filtration precision up to 1 micrometre]: This filter element uses high-quality coconut shell activated carbon as the filter material, providing filtration precision up to 1 micrometre. It efficiently removes impurities such as sand, rust, sediment, and odors, while effectively reducing 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 helps prevent 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 (performance may vary based on tap water quality). For proper siphoning in drip systems, fully submerge the carbon filter once a week. [Cost-effective]: These filters provide reliable filtration performance comparable to leading brands, offering a cost-effective solution for high-quality water filtration. [Note]: Before installation, soak and rinse the filter to remove residual manufacturing particles. 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.