Made for openings from 3' 0" wide by 8' 0" height with a maximum jamb width of 6".

Manufactured from 12-gauge galvanized steel.

Maintenance free stainless steel operating mechanism.

Highly rust resistant paint always provided.

Allows 50% of ventilation, and 50% illumination. Manually operated.

Designed for correctional, school, or moderate security conditions. Allows installation of insect screens, security mesh or a fixed glass panel.

Has been tested for air and water infiltration under hurricane conditions with excelent results.