Each premium Marvin Integrity fiberglass casement or awning replacement window is built with strong Ultrex fiberglass inside and out. The sturdy build also creates the effect of clean sightlines and large open spaces in your home. The Marvin Integrity casement & awning replacement windows are perfect for achieving a contemporary feel. Marvin Integrity’s Fiberglass windows are also available in double hung, and slider/glider styles. For more information, give us a call at (414) 329-1200 or visit our showroom at 2911 S 160th St, New Berlin, WI.