Upgrade your dryer ventilation with the NDA 4" x 5' UL Dryer Duct Kit, designed for safety, durability, and easy installation. This UL 2158A approved kit ensures your dryer operates efficiently while reducing the risk of lint buildup and overheating. Features: UL 2158A Approved Meets industry safety standards for dryer transition ducts. 5-Ply Metal Foil Construction Provides superior strength, flexibility, and heat resistance. Standard Size Compatibility 4" diameter fits most dryers and vent outlets. Ideal Length 5' length is perfect for typical dryer-to-wall connections.