Hometime Window uses only the finest raw materials to manufacturer The Regal Series Standard Sliding Patio Door 

• Maintenance-free durable "Royal DURA" 100% pure vinyl extrusion
• Engineered to meet and exceed Energy Star standards
• Energy Star rated dual pane Cardinal LoE 366 Triple Silver coated tempered glass for superior energy savings and protection against fabric fading
• Fusion welded corners on main frame and door panels for utmost watertight seal and strength
• Multiple hollow chambers for maximum strength and superior energy efficiency
• Beautiful beveled exterior frame
• "Warm edge" Envirosealed Spacer system reduces energy loss and condensation
• Reinforced with galvanized steel for added strength
• Double mortise lock and keeper system for "maximum security"
• Certified to meet or exceed the industries toughest forced entry codes
• EZ glide 1-1/4 tandem ball bearing adjustable rollers for smooth operation and durability 
• Stainless steel roller track
• Continuous reinforced interlocks stiles for security and weather tight performance
• Optional sculptured and flat grids available in various grid patterns
• Available in XO, OX, XOO, OOX, and OXXO
• Thermal U-Factor .33
• Energy Star Partner, AAMA, and NFRC Certified
• Product qualifies for 2011 Federal Tax Credit