Protec™ Extended Life Humidifier Replacement Filter 2 Model PWF2.
Use with Models: Vicks V3500N, V3100, V3900, V3700; Sunbeam® 1118; Honeywell® HCM-350
Protec treated filter inhibits up to 99.99% of mold growth on the filter*.
Removes minerals and pollutants from water.
Filter helps prevent the growth and migration of mold, algae and bacteria on filter.
[This is a brand new humidifier filter that was only taken out of the box for the photo. I ended up purchasing a different humidifier that does not use this type of filter.]