Efficient Filtration: Our activated carbon filters effectively remove sand, rust, heavy metals and large sediment particles, improving the taste and purity of water. Enjoy cleaner and safer water with improved flavor. Money Saving Solution: Each pair of our black filters can filter up to 2000 gallons of water, saving you 4,500 bottles of pure water. This cost-effective solution helps you save in the long run. Reliable Outdoor Companion: Our filters provide clean drinking water, making them perfect for outdoor adventures. Enjoy the great outdoors without worrying about the quality of your drinking water. Efficient Filtration: Developed for families who use inferior drinking water, for travel and outdoor activities, the WD-BB9-2 black water filter uses natural coconut shell activated carbon and a BPA-free housing. The filter reduces contaminants such as chlorine, sand, rust, odor, sediment and large particles and improves the taste of the water. It provides you with clean and safe water. Note: The data are all measured manually, please allow an error of 1-3 cm due to differences in light and display, there may be color differences, please refer to the actual item received.