0.01 um ultrafiltration membrane: The 0.01 um ultrafiltration membrane can reduce most harmful substances that are larger than x 0.01 um. The integrated-waterway under sink water filter system can effectively reduce residual chlorine, taste and odor, fluoride, heavy metals and prevent leakage. Please note that Waterdrop under sink water filter can retain potassium, calcium, sodium, magnesium and other minerals that are beneficial to health, but it cannot reduce the TDS. Integrated waterways: This Waterdrop under sink water filter system adopts advanced integrated waterways to prevent water leakage, so that you can feel free to replace the filter without shutting off water supply. The under sink water filter can give you a safe water drinking experience. month filter lifespan: With the adoption of the advanced ultrafiltration membrane design, the service life of the under sink water filter system is prolonged to 24-months, the replacement frequency is reduced and the maintenance cost is saved. Besides, the lifespan of the PP filter is 6-months and the lifespan of the CT filter is 12-months.