This Kaz Humidifier filter features honeycomb filtration to trap mineral pollutants found in water and help prevent them from entering the air and fits models 885, 3000, 3300, 3400 and EV710. It also features a patented rigid support long lasting design. Measures approximately 5.12" H x 6.75" ID x 7.75" OD x 0.5" thick For optimum performance, replace filter twice a season.