Designed for low- and mid-rise applications, the durable framework of the 400 Series Curtainwall provides exceptional structural performance reducing the need for steel reinforcing. This system has a sight line of 2-1/2″ and the strength of variable-depth backmembers from 3-3/8″ to 8″. An exterior screw-applied pressure bar secures the glass. Snap-on covers, available in a wide range of colors, allow for different finishes on interior and exterior exposed surfaces. Silicone-glazed verticals are available for a seamless appearance. Both the 200 and 400 Series Curtainwall systems are subjected to rigorous testing by an independent agency, ensuring that you get the highest quality curtainwall products that the industry has to offer.