When security is a priority, but you want to maximize air circulation, light infiltration and visual access to interior spaces, the Model 683 side folding open air grille is an ideal choice. Open-air side-folding grilles provide security, while allowing air circulation and full visual access to interior spaces. Model 683 offers a wide range of features to fit most any application where an open-air grille satisfies security requirements, such as in retail environments, malls, schools, offices and airports. The product line is distinguished by a variety of curtain patterns, colors and finishes.