About This Compatible Models: Xmntdo black water filter can replacement for Berkey BB9-2 water filter, Berkey gravity filtration System, W9361122 & W9361123 System, Compatible with Travel, Big, Royal, Imperial, Crown Series Cost-effetive: Replacement for Berkey filter provide the same strong purification capacity as the original filter, By choosing us, you can enjoy the benefits of high-quality water filtration while keeping costs reasonable and cost-effective High Efficiency Filtration: The replacement for Berkey filters use natural coconut shell activated carbon and upgraded filter materials contain silver ions, can reduce up to 99% of chlorine and heavy metal, sediment, chlorine, sand, rust, odor and large particles in source water Safe Natural Materials: The replacement for Berkey water filter is certified against NSF/ANSI 42 standard.we use BPA-free and lead-free materials in our filter housings to ensure safety Durable Life Span: To achieve optimum performance,we recommend you replawce the black carbon filters every 6,000 gallons per pair,Specific replacement time depends on water quality Warm Tip: Please flush filter for 60s before use by connecting to faucet,If faucet not fully compatible, splashing may occur but won't affect product.TDS level does not fully indicate the quality of the water and our filters does not lower TDS value Overview Material : natural coconut shell activated carbon Product Dimensions : 2.26'D x 2.26'W x 8.35'H Item Weight : 1.43 Pounds External Testing Certification : NSF Product Benefits : Removes Odor, Removes Fluoride, Removes Iron