Replacement filter set only for APEC ROES-UV75-SS with serial number AZ-UVSS-2500 and above Made with high quality filtration components to protect and prolong the lifespan of your reverse osmosis system Includes 1 sediment filter, 2 carbon block filters and 1 UV replacement light bulb Premium quality pre-filter set lasts over 6 months for high performance contaminant removal. Effective in removing dust, particles, rust, chlorine, tastes, odors, cloudiness, colors, VOCs and other common chemicals from the water Continuous UV sanitization destroys up to 99. 99% of bac., vir. and cysts for chemical-free purified drinking water