Add style and functionality to your windows with a variety of optional features, especially for our Custom Windows. For example, for screens, The Window Design Group offers invisible screens that allow the screen to roll up and out of sight when not in use. Hardware finishes are important to consider for any windows and The Window Design Group has a wide variety to choose from. Vinyl window options included on The Westbridge Series offers a clean contemporary window design with a variety of grid options and configurations. optional features of the Westbridge window include Low-E Glass, Argon Gas, Insulated Frames, Equal Sight Lines, SunClean Neat Glass, 3 1/4″ frames, Edgetech Super Spacer’s Warm Edge Technology, Set Back Glass and Lifetime Glass Breakage Warranty.