• Fits a single zone (3? or 4.5" interior width) and expands in depth to accommodate different line set sizes
• 4-stage adjustability allows the duct to expand from 2 to 4 inches deep
• Stay-Clean peel-n-go film allows for a no-fuss clean-up following an install
• Components are UV stabilized and tested to temperatures from -4 degrees F to 140 degrees F
• Quick snap cover won't release under pressure
• Easy lock adjustable fittings can be opened and closed as needed, so the system can be adjusted as necessary at any time
• Cam screws are constructed of hardened plastic and will never rust