This kit allows you to help ventilate your garage while keeping the door closed and locked. The patented retractable wheel design allows you to quickly remove the wheels on the top panel from the track so the top panel can tilt and help ventilate your garage. The included bracket supports the top panel at selectable angles. On sale now from MSRP $149.99. Made in NJ, USA. (We combine shipping for multiple kits purchased in one order.)