Strong and durable, 18 x 16 mesh, 0.011 diameter screening. Protective finish prevents corrosion, strengthens weave, and enhances appearance. Resists rust and will not sag. Used by contractors and Do-It-Yourselfers. Ready rolls enough to cover 2 average size windows or 1 average size screen door. Economy rolls enough to cover 6 average size windows or 3 average size screen doors, plus screening left over.