Mortise and tenon solid wood construction add strength and durability. 1-1/8 x 2 in 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.