16" x 6", Economical, Flat Screen Vent, For Flush Or Surface Mount, Easy To Install With Half Punched Nail Or Screw Guides At The Corners, Designed For Vents Spanning Between Wall Studs 16" On Center, Galvanized Steel Frame With 1/4" Galvanized Wire Mesh 23 Gauge, Net Free Vent Area 62 SQIN, Overall Dimensions: 15-1/4" x 6-3/4", Rough Opening: 14" x 5-1/2".