Andersen® 200 Series Perma-Shield® gliding patio doors have panels that move on ball-bearing rollers. The result is long-lasting, smooth, effortless operation. With at least one panel that glides smoothly past another door panel, youll get more room where you needinside or out. A tried-and-true classic, these doors are protected inside and out with rigid vinyl cladding to give homes a contemporary look and energy-saving performance, while keeping maintenance to a minimum. Theyre available in two-panel configurations and with the most popular options and accessories