Open-air side-folding grilles provide security, while allowing air circulation and full visual access to interior spaces. The 681/682/683/684 Series offer 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. Several models are available with wide-body panels, and the 681-E and 683-E Series are available with an economical high impact extruder polymer (HIEP) curtain. A countertop version is also available. Series 683/683-E Suregard™— 6-5/16" standard width panels, framed by min. 4" (102mm) high aluminum bottom plates and 5-1/4" (133mm) high aluminum top plates. Panels are constructed of 1/8" (3mm) by 6" (15mm) horizontal aluminum links that slide onto 5/16" (8mm) vertical rods. Roads are held in place by 1/2" (13mm) aluminum (683 Series) or HIEP spacer tubes (683-E Series) on alternate rods.