OKNA 500 Series Window
OKNA 500 Series Insul-Tec Deluxe Window The Okna 500 Series Insultec Deluxe window offers both great looks and energy-efficient features at a great price. The 3¼” Depth Welded Mainframe is 100% pure vinyl with a beveled colonial exterior which features curves that are not only beautiful, but also allow for maximum weld surface resulting in …