Fiberlux's Series 2000 vinyl window systems features high-performance, multi-chambered extrusions high-strength vinyl. The system offers 3 1/4-in. frames and 1 3/8-in. frames and 1 3/8-in. sash that can be assembled in fully welded or welded-frame/mechanically attached formats to fabricate double-hung, 2- and 3-lite horizontal sliders, tilt-and-slide units, picture, bay/bow units and a variety of architectural shapes.