●Grille Curtain. Clear anodized aluminum tubes over steel rods for added strength and security.
●Guides: Clear anodized extruded aluminum with polyethylene wear strips for smooth operation
●Bottom Bar. Clear anodized aluminum with low friction nylon blocks mounted at ends for smooth and quiet operation.
●Locking. Slide bolt locks standard on all Grilles.
●Counterbalance. Helical torsion springs calculated for optimal ease of operation.