Lockable Carbon Rod Filter Element: The filter element combines a black purification filter element and a PF-2 fluoride replacement filter element, which can definitely reduce harmful substances in outdoor water sources. Material: Our black water filter uses natural coconut shell activated carbon and a BPA-free shell to ensure excellent reduction performance and will not filter particles in the water. High-quality carbon block: It can absorb impurities such as sand, rust, dust, peculiar smell and peculiar smell. The product has uniform particles and a smooth surface, which can reduce chlorine appropriately. It provides you with clean and safe drinking water. Economical and durable: The black water filter can provide 6,000 gallons of fresh water. For best performance, we recommend changing the filter every 6,000 gallons. However, this may vary depending on your water quality conditions.