【Compatible Model】Compatible Replacement Filter for iSpring US15SL Under Sink Water Filter System (ASIN B09MJJMX8G), US15SD Under Sink Water Filter System (ASIN B09NCGDWNQ). This under sink filter brings you purified water from your original faucet, your dedicated faucet, or your refrigerator. Get easy access to clean, safe, and healthy purified water with iSpring! 【Innovative Composite Filtration Media】The iSpring Under Sink Water Filtration Replacement Filter uses innovative composite filtration medi. The composite filter media includes CTO,CaSO3, KDF55, polyphosphate, which can effectively reducing up to 99% of chlorine, odor, bad taste, heavy metals, sediment, and more, including preventing scale build-up. This under counter water filter does NOT lower TDS but will retain useful minerals instead. Enjoy healthy and pure water straight from your tap – no need to buy bottled water anymore! 【Safty & Premium Materials】Specially selected premium materials are lead-free. Activated carbon block and other advanced filter media ensure efficient and safe filtration. KDF effectively keeps the filter sanitary. It effectively reduces chlorine, taste, and odor. The BPA-free, lead-free material provides more reliable use from the inside out. 【Quick Replacement】The twist-and-lock design of the under sink filter ensures that you can replace it in 3 seconds without any tools, saving you time and effort. When used with municipal water, each Under Sink Water Filter has a maximum service life of 1. 【Peace of Mind Customer Service】 Register online to activate your manufacturer warranty and lifetime free tech support from the U.S. local support team. We stand behind our products, and if you encounter any problems with any of our products please reach out to us immediately. We are happy to help!