This Bryant aluminum mesh humidifier filter (includes 2 filters and one plastic tray) features honeycomb filtration to trap mineral pollutants found in water and help prevent them from entering your home. Fits models 49BB001/910A and 49BH/912A-912B humidifiers. This media replaces 88NH0312BB07 and 88NH0312BA12. However, it does not contain the aluminum distribution tray. It measure approximately 11 x 11.9 x 3. For optimum performance, replace filter once every 6 months or more often in hard water areas.