Compatibility: Our PDC51V2 Desalination for Protec Desalination Humidifier PDC51V2 for VUL525, VUL530, VUL545, VUL565, V5100, VUL575 Series! for HUL525, HUL530, HUL545 and HUL565 series. CARE FOR : The PDC51V2 humidifier replacement filter provides a gentle, healthy mist by capturing minerals and irregularities in the water. The filter also keeps your humidifier clean and helps prevent white dust, keeping it looking its best while producing the , cleanest mist. Efficient operation: Demineralizer For best results, replace as needed (every 2-4 weeks, or 15-30 refills with normal use) or when the humidifier has not been operated for an extended period of time. Reduce White Dust: The PDC51V2 demineralizer helps capture minerals, preventing them from being released into the air and settling on surfaces. A water demineralizer helps remove white dust. How to install: Remove the water tank and empty all water from the tank, insert the filter elements into the humidifier water tank, replace the water tank and wait 15 minutes for water to pass through the filter, then restart the humidifier. Colour:Blue & White Material:ABS Package Contents: 3 * desalting box Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.