Superior Insulating Value: standard high-performance glass package features 15/16" double-strength, laminated glass; tempered, low-e, Duralite® high-performance spacer by Quanex and argon gas fill
Robust vinyl, multi-chambered master-frame construction contains over five pounds more PVC than the competition for increased structural integrity. The chambers add thermal efficiency and strength
Fully fusion-welded frame and sash for structural integrity
Traditional craftsmanship look with beveled exterior
Cam-style lock with adjustable keeper for reliable alignment and positive latching
Sashes interlock for thermal efficiency, alignment and strength
In 2-lite sliders, both sashes operate for ventilation;
Monorail-design slider pad in sash track for smooth glide operation
Extruded designer pull rails make opening and closing a cinch
Easy cleaning: operating sashes lift out
Exceptional Lifetime warranty coverage — on sash, frame, and hardware materials for as long as you own your home and transferable if you sell it