TV SD, NSF Certified: Our filters are tested and certified by TV SD to reduce chlorine in water. This filter is NSF 372 certified for lead-free materials. It is NSF 42 tested and certified to reduce chlorine, odor and odor. CLEAN AND DELICIOUS: Tested by a third laboratory, the high-quality ion exchange resin and granular activated carbon used effectively reduce chlorine, taste, odor, fluoride, heavy metals and other potentially harmful contaminants in water, improving water quality and providing fresh water. 1 Month Refresh: For best results and continued refresh, it is recommended to replace the filter every 1 month, depending on your water quality. Replacement Models: Replacement for Brita Maxtra+, Replacement for Brita Bottles, Marella, Marella XL, Marella Cool, Style XL, Elemaris XL, Mavea Elemaris System, Brita Series Bottle Filters are not original. See the instructions in the box for detailed instructions. Hopefully you only drink clean water. If you have any issues with the product, please let our customer service team know and we will handle it immediately. our Products are made from the highest quality materials and designed to provide you with the best user experience. We aim to ship all orders within three days of purchase, with an estimated delivery time of 8-15 days. When shopping, please pay attention to the size and dimensions of the product to ensure it meets your needs. In the title and , we provide detailed information about the product, including its features and specifications. We want you to be completely satisfied with your purchase, so if you have any questions or concerns, please feel free to contact us. We are here to help and will do our best to assist you. Thank you for choosing our product. we hope you like it