Vintage Technologies WD09 RV Teardrop Tear Drop Toy Hauler Camper Trailer Windows (1) 30"W x 20"T Configuration:Horizontal half vent with a screen and window lock, Includes stainless steel mounting screws Cut Out 30-1/4 x 20-1/4 Outside Measurement31 1/4 wide x 21-1/4 tall Corner Radius 3-5/16 Wall Thickness: Sold with  trim ring for a  wall.