Fits Day and Night humidifier models 49BB001/910A and 49BH/912A-912B. Day and Night aluminum mesh humidifier filter media. Includes 2 filters and one plastic tray.* This media replace 88NH0312BB07, and 88NH0312BA12. However, it does not contain the aluminum distribution tray that provides uniform distribution throughout the pad. Without this pad serious water damage could occur. Please click on the following Installation Instructions for further information. Measures approximately 11.0" x 11.9" x 3.0".