Our Quikserv self-closing drive thru transaction windows are a popular choice for all drive thru applications. These windows meet all FDA health code requirements. The window units are mounted flush to the exterior wall. By simply releasing the window after serving the customer, the door panel closes automatically. With an offset in the base, and gliding on a top-hung ball bearing system, these sliders are some the smoothest windows on the market. Trusted by numerous industry professionals, including Burger King, Arby's, Jack in the Box, and Chick-fil-A.