Solid pine AuraLast® wood protects against wood decay, water saturation and termites Mortise-and-tenon joints for maximum strength and durability Integral nailing fin for increased strength and easy installation Natural wood interiors are ready for staining or painting Sash thickness is 2-3/32" to increase visual warmth and appeal Factory-applied jamb extensions available in a variety of widths High-performance argon-filled LoĒ³-366 insulating glass for greater energy efficiency Preserve® protective film Full weatherstrip system for added energy efficiency and comfort E-Gard® operator and single-action unison lock for easy, smooth operation Nesting folding handle Hardware in Chestnut Bronze, White or Desert Sand BetterVue™ insect screens let in more light and keep more insects out* Additional feature for clad-wood exteriors 41 exterior clad colors with commercial-grade 70% Kynar 500® resin system Optional copper cladding in Bright Copper, Speckled Patina Copper or Hand-Rubbed Patina Copper Optional exterior trim: brickmould, 3-1/2" flat casing, Adams casing or Manchester casing Optional interior wood species: mahogany, alder or vertical-grain Douglas fir Additional feature for wood exteriors Exterior is factory-primed and ready for painting Optional natural (no prime) pine, vertical-grain Douglas fir or mahogany exterior Optional factory-applied exterior trim: brickmould, backband, 3-1/2", 4-1/2" and 5-1/2" flat casing or Adams casing Optional precise simulated divided lites * Insect screens are intended to allow air and light in, while keeping insects out. They are not intended to stop children from falling through an open door or window. For safety screens and other security devices, contact your local building supply retailer.