These compatible Evenflo 755000 humidifier wick replacement filters fit Evenflo humidifier models 755, 755000, 755001, 758100, and 759200. Measures approximately 4 H x 4 1/2 ID x 6 1/2 OD x 1 Thick. Features an antimicrobial agent! Honeycomb filtration to trap mineral pollutants found in water and help prevent them from entering your home. For optimum performance, replace filter at the beginning of each season or every 2 months depending on use.