Mortise and tenon solid wood construction add strength and durability. 1-1/8 in 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. Ready to paint. Easy to rescreen and comes with a 1-year warranty. Hardware not included. Fits 80 in to 81 in Opening.