AprilAire 5443 replacement filter For AprilAire dehumidifier models: 1830, 1850, and 1852, or For AprilAire ventilation models: 8191 and 8192 MERV rating: 8 Materials: Aluminum and Polyurethane Foam Measures: 10" H x 1" W x 12" D New, never used, as shown by the first pics of the unopened shipping box with label. Opened the box only to take pics of the contents, immediately resealing after.