Enjoy more glass and less frame with this sleek, contemporary style. It glides smoothly, maintains easily, and stands up to the elements.The streamlined, contemporary design of our Perma-Shield® gliding patio door maximizes glass area so you enjoy the widest possible view. Built with High-Performance™ glass, each door has a patented, full-length weatherstrip/interlock system that helps take the worry out of harsh weather. The interior and exterior is also covered with a rigid vinyl sheath that maintains the attractive appearance of the door while keeping maintenance to a minimum. Dual ball-bearing rollers with self-contained leveling adjusters keep this door gliding smoothly over time.