Double-layer window ac insulation construction effectively blocks heat transfer, improving airtightness to minimize cool air loss from your portable AC. This window ac insulation kit includes 3 foam boards and 1 adhesive strip, providing all essential components for quick setup on single or double-hung. Foam insulation boards support free customization via cutting, allowing easy adaptation to different exhaust hole and AC duct sizes for flexible installation. Thick, robust insulation board material boasts long-lasting durability and helps reduce external noise, enhancing your daily comfort when using portable air conditioners. Gray ac foam insulation seamlessly matches most window frame styles, keeping your space looking tidy while delivering reliable thermal sealing performance., Weight: 0.440924524 Pounds, Manufacturer: Ameble_E77_8115995