PREMIUM REPLACEMENTS FOR PROTEC, VICKS & KAZ WF2 FILTER & PWF2 FILTER - Premium WF2 compatible replacements for your Vicks, Protec & Kaz humidifiers. Each filter features a center metallic support layer to maximize rigidity and minimize sagging once wet | FITS VICKS COOL MIST HUMIDIFIER FILTER, VICKS GERM FREE HUMIDIFIER FILTER & MORE: Vicks Starry Night, V3100 (flattened), V3500, V3500N, V3600, V3700, V3800, V3850, V3850JUV, V3900, V3900JUV, &VEV320 | FITS HONEYWELL MODELS: HCM-350, HCM350B, HCM-300T, HCM-315T, HCM540, HCM-630, HCM-631, HCM-645, HCM-650, HCM-710, HCM-1000 & HCM-2000 | OUR WF2 HUMIDIFIER FILTER REPLACEMENTS ALSO FIT THE FOLLOWING MAKE & MODELS: Sunbeam SCM1118, SCM1119, SCM 1120, Kaz 3020, Enviracaire ECM-250i, ECM-500, ReliOn WA-8D & Robitussin DH835 | TIPS FOR BEST RESULTS - Flip filter daily to reduce molding, use antimicrobial capsules (sold separately) and only fill humidifier tank with distilled water. Hard water greatly reduces the life of your filter and yellows it prematurely. Soak new filters in cool water before replacing to ensure uninterrupted moisture output