The open style GUARDIAN is available in straight or brick patterns.  The grille construction is based on the VISTA system of individual panels interlocked together by full height hinge members.  This provides an extremely smooth folding, easily operated grille.  Combined with the high security that it offers, this grille is ideally suited to locations requiring ìbehind glassî protection. Copyright © 2001 Amstel Manufacturing (1993) Inc. See our Standard Disclaimer and Copyright Information Page.