Mortise and tenon solid wood construction add strength and durability. 1-1/8" x 2" stile creates strong framing member.Each joint sealed with a waterproof cross linking resin adhesive. Kiln dried to eliminate warping. UV resistant fire retardant fiberglass insect screen. Beveled edges on framework. Spline applied screen allows easy repair. Reversible for left or right handed openings. Hardware not included. 3-year warranty.