Exceptional Design: These well-built feeder windows feature a sleek rounded corner design that is both aesthetically pleasing and robust Strong Drop-Down Aluminum Bars: These aluminum bars are added for optimal safety so that the window can be opened, and your horse can enjoy the extra air flow while the trailer is in motion Heavy-duty Hinges: The best quality hinges add even more strength to the unit Easily Accessible Screen Door: The screen door is attached to the inside of the window. You can keep the window open with the screen and bars in place to keep your animals cool during travel, and your trailer insect free User Friendly Handle: The pull handle, which is optional, makes operating this window simple and quick. It is light-weight and located low enough so that it is easily accessible