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 HiMark by Okna 500 Series Vinyl Replacement Windows

himark windows The Okna 500 (Insul-Tec) is our most popular choice for window replacement in Milwaukee, Waukesha, and Madison, and for good reason. The 500 series offers elite level performance ( U value of .25 in double pane, Air infiltration of .02cfm) in a cost-effective package. Beauty, strength, performance, The Okna 500 series is the “bang for the buck” champion of replacement windows. -Top performance ratings -Best lifetime warranty -Highest customer satisfaction Okna double hung replacement windows Milwaukee 500-2500 okna double hung windows milwaukeereplacement windows ratings