Wide compatibility - Suitable for casement windows and roof windows, compatible with multiple window styles for residential or professional use. Air sealing and energy efficiency - Airtight seal reduces heat loss, helps maintain indoor temperature, and can lower energy bills. Durable and reliable performance - Made of high density foam for stable performance and extended durability. - Resistant to thermal variations to provide reliable sealing around window air conditioners throughout its service life. Comfort, safety and year-round use - Solid material design improves year-round comfort, protects your home environment, and ensures safety without harmful effects. Use scenarios - Sealing around a window air conditioner in a casement or roof window to reduce drafts and improve interior comfort. - Installing in rental properties or office windows to enhance energy efficiency and reduce utility costs. - Retrofitting older homes with irregular or large window gaps to improve insulation and comfort during all seasons.