[High-Efficiency Filtration] This water filter element set is a replacement for gravity filtration system filters. It has passed high-standard testing by authoritative institutions and effectively reduces chlorine, fluoride, heavy metals, taste and odor, sediment, particles, and other harmful substances. Enjoy clean and healthy water anytime, especially in outdoor settings.[Black Filter] The black filter is made from high-grade, high-quality materials. Compared to ordinary granular activated carbon, it offers higher adsorption capacity and effectively reduces fluoride, chlorine, and various impurities.[Fluoride Filter] The fluoride reduction element is designed to adsorb fluoride as well as residual heavy metal ions such as vanadium (V) and pre-oxidized (III).[Perfect Compatibility] This set of filter elements is compatible with gravity filtration system filters, including FOR Super Sterasyl, Traveler, Royal, Big, Imperial, and Crown Series. It is recommended to replace the water filter every 1,000 gallons and the black filter every 6,000 gallons for optimal performance, or based on your specific water conditions.Material: Plastic Color: White + Black Package Contents: 2 x Water Filters 2 x Black Filters Note: Light reflection and differences in display screens may cause slight variations between the color of the item in the image and the actual product. Measurement may vary by +/- 1-3 cm.