Frost King 62 in. x 210 in. Polyurethane Extra-Large Shrink Window Insulation (2 per Pack)
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The Thermwell Products Co., Inc. 62 in. x 210 in. Polyurethane Extra-Large Shrink Window Insulation (2-Pack) helps improve the R-value of a single-pane window by up to 90%. The insulation features polyurethane construction.