Effective Filtration: Designed for families using substandard 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, odors, sediment, and large particles and improves the taste of the water. It provides you with clean and safe water. Excellent Choice: The WD-BB9-2 black water filter fits perfectly with the original brand without causing water leaks. Our water filter provides high-quality water support for home, travel, and outdoor activities. It's also a great gift idea for family and friends. (If you are unsure about the brand and model, please contact us at any time.) Long-lasting lifespan: The WD-BB9-2 black water filter can provide 6,000 gallons (22,712 liters) of fresh water. For best performance, we recommend replacing the filter every 6,000 gallons (22,712 liters). However, this may vary depending on your water conditions.