The Thermwell Products Co., Inc. 62 in. The insulation features polyurethane construction. Frost King window insulation kit for interior use. Material Polyurethane. Product Width (in) 210 in. logo {width: 100%;}.
The Thermwell Products Co., Inc. 62 in. The insulation features polyurethane construction. Frost King window insulation kit for interior use. Material Polyurethane. Product Width (in) 210 in. logo {width: 100%;}.