http://www.dialonewindows.com/ Learn about Renewal by Andersen gliding windows 
professionally installed by Dial One Window 
Replacement Specialists in Orange County, CA. These 
windows are made from Fibrex material, a composite 
material that is more than twice as strong as vinyl and 
comes in over 30 color combinations. These windows 
actually "glide" on an elevated rail for ease of operation 
and long term durability.