The 4" Aluminum Tee Cap from Southwark Metal Mfg Co is designed for efficient ductwork applications. This durable aluminum cap features a robust construction that ensures longevity and reliability in various HVAC systems. With a diameter of 4 inches, it fits standard duct sizes and is ideal for sealing off duct ends. The lightweight aluminum material provides excellent corrosion resistance, making it suitable for both indoor and outdoor use. This tee cap is compliant with industry standards, ensuring it meets the necessary performance requirements for ventilation and air distribution.