Since 2007 Vetrina Windows has been hand-crafting high-performance window systems that are manufactured right here in the Philadelphia area. Vetrina’s products begin with a precisely engineered frame that holds the glass, weatherproofing, thermal insulation, and mechanical components. To ensure strength and consistently high quality of our profiles, we use the 6063 aluminum alloy – T6 extrusion temper grade. Our state of the art metal extrusion process meets and exceeds the specifications set forth by the American Aluminum Association, and has been used extensively in a number of military applications.