Galvanized 3.25 x 10" rectangular wall vent for microwave venting, kitchen venting, and other exhaust applications. Includes spring loaded damper with magnet and weather seal for positive air closure. A 1/4 inch steel mesh screen is included to deter animal and bug entry. Available sizes include 3.25 x 10", 3.25 x 12" and 3.25 x 14".