SERIES 55 ALUMINUM PATIO DOOR Thermal Sliding Glass Door EASY OPERATION Doors glide effortlessly on tandem brass roller assemblies. The heavy-duty screen also has rollers at the top and bottom and moves in its own individual track. Both the door and screen are extremely durable and designed for years of trouble-free operation. ENERGY EFFICIENT Doors are glazed with 7/8” tempered insulating glass and come completely sealed with heavy-duty weatherstripping.  These features, combined with the thermally broken door and frame design, create an energy efficient temperature barrier suitable for all climates. TOTAL SECURITY Glyder Doors and Screens feature heavy-duty “clam lock” locking systems for total security. Both locking systems have anti-lockout devices. VERSATILE Doors are available in 2-panel and 4-panel configurations. Full size sidelites are available to create a multiple panel option, All 4-panel doors have both center panels operational. EASY INSTALLATION Glyder Doors feature sturdy 6” thick frames to eliminate drywall return. Installation clips eliminate need for shims at jambs and are provided for different wall thicknesses. OPTIONAL FEATURES Internal grid system for French Door look. Energy efficient Low-E glass. Bronze tinted glass. Bronze, White and Driftwood colors.