Simonton windows are the brand of windows that we use. According to the September 2009 J.D. Power Report, Simonton windows rank highest in customer satisfaction in comparison to other top competitors. These windows come with a variety of features such as Fusion-Welded Construction, Contoured Extruded Lift Rail, Lap-Lok Meeting Rail, Tilt-in/Lift-out Sash, Between-the-Glass Grids, and other options that you can view at www.simonton.com.