Double 4″/ 6″ In-Line Sleeve designed as a retrofit application to replace existing wall caps. Includes one 4″ and one 6″ duct sleeve with backdraft dampers and rubber gaskets, 12″ x 8″ vertical louver and frame.
Easy 3 step installation with no disturbance to existing exterior wall. Can be customized to fit unique field conditions. Unlimited custom color options available.