[Filtration precision up to 1 Micrometre]: In order to achieve 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, odor, etc., while effectively absorbing residual chlorine, with a removal rate of more than 99%. [Compatible Models]: The filter can replace water filters. 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, saving initial flushing work. No low flow issues. [Durable Lifespan]: To extend the life of your device and get the best performance, we recommend you replace the filter every 6,000 gallons (depending on the quality of the tap water). Please note that you must fully submerge the carbon filter once a week in order for the drip system to siphon properly. [Affordable and cost-effective]: Why pay 4 times the price for a brand? Filters offer the same level of filtration and performance as name-brand filters, but at a more affordable price. By choosing us, you can enjoy the advantages of high-quality water filtration while keeping costs affordable. [Note]: Before installing the filter, soak and clean the filter to remove residual manufacturing dust. Colour: Black Material: Coconut shell activated carbon Package Contents: 4 x Water purification filter elements Only the above package content is included; other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture to appear slightly different from the real thing. The measurement allowed error is +/- 1-3cm.