BestAir Extended Life Humidi-Wick HW500 Humidifier Wick Filter

Patented reinforced design for longer life and better efficiency than standard expanded wicking filters. Traps impurities in the water. Anti-microbial treated. Fits Honeywell HCM-300T, 310T, 315T, 530, 535, 535-20, 540, 550-19, 550, 551, 560, 630, 631, 632, 632TG, 635, 640BW, 645, 646, 650, ECM-250i, HCM-1000 series, HCM-2000 series. Fits Kaz 3020. Fits Vicks V3100, 3500, 3500N, 3600, 3800, 3850. Fits Relion RH1300, WA-8D. Fits Robitussin DH-835. Fits Sunbeam 1118, 1119, 1120. Fits Environizer 63-1508.