Thermally welded multi-chambered 5-5/8″ vinyl frame provides superior strength and thermal insulation. Shown with optional Foam Filled Insulated Extrusions for better thermal efficiency. (Insulation type may vary during the manufacturing process) 4mm  glass unit with Heatseal®  Spacer which gives  your home  excellent thermal efficiency and drastic reduction of condensation.

• Interlocking meeting rail system with double weather-stripping for controlling infiltration of air, water, dust and noise.
• Anodized aluminum screen track, roller track, and threshold for increased strength , durability, and longevity along with an elegant appearance.
• Operating sash is equipped with adjustable, precision bearing tandem rollers for a smooth and quiet operation.