DEFLECTO 3" to 4" Aluminum Duct Adapter

The DEFLECTO 3" to 4" Adapter is designed for efficient HVAC installations, serving as both an increaser and reducer. Made from fire-resistant aluminum, it offers durability and safe performance in residential or commercial ductwork. Its classic silver finish and straightforward installation make it a practical solution for adapting vent sizes. Ideal for professionals and DIYers engaged in home improvement or repair.