Vintage Technologies WD04 RV Teardrop, Toy Hauler, Horse Trailer, Windows (1) 14"x16"x 3/4" Trim Rings Configuration: Vertical half vent with a screen and window lock, Includes stainless steel mounting screws Cut Out 14-1/4 x 16-1/4 Outside Measurement 15-1/4" wide x 17-3/16 tall Corner Radius 3-5/16 Wall Thickness: Sold with  trim ring for a  wall.