Anti-bacterial treated, traps minerals. Replacement filter fits Honeywell, Kaz, Vicks and Robitussin humidifiers. Metal reinforcement. Adds rigidity to shape of the wick filter when moistened. Also adds stability with today softer, more absorbent paper. Prevents slumping or insagging in over time or when wet. Helps to maintain the humidifier designed output. Wick filter fits Honeywell HCM300T, 310T, 315T, 330T, 350, 350B, 530, 535-20, 540, 550-19, 550, 551, 560, 630, 631, 632, 632TG, 635, 640BW, 645, 646, 650, 710, ECM-250i, ecm-500, HCM-350 Series, HCM-540 Series, HCM-1000 Series, HCM-2000 Series (HAC504), Kaz 3020, Vicks V3100, V3500, V3500N, V3600, V3700, V3800, V3850, V3850JUV, V3900, Relion RH1300, WA-8D (WF2), Sunbeam 1118, 1119, 1120, Environizer 63-1508, Robitussin DH835.
