SPECIFICATIONMaterial: Our steel fixed glass windows are handmade using heavy-duty 12-gauge steel.Glass: Standard 5/8 Inch double-pane insulated glass. It can be opened for great ventilation and easy cleaning.Jamb: Our steel fixed glass windows feature standard 2" x 6" Jambs that are insulated with high-density foam for energy efficiency.Finishes: All steel fixed glass windows are zinc galvanized and coated with a clear lacquer to protect them from rust & corrosion.Customization: We offer opportunities for a fully customizable design to match your personal taste. If you find that the size and design you want are not listed on our website, feel free to contact us.Notice: Due to hand-forged craftsmanship, every piece of custom-made product may look different from the picture shown. Small differences in the design and finish may occur.  Please refer to the final CAD drawing. We do not consider product variances as defects.