Wall Duct Adapter

Wall mounted duct adapter, perfect for 3D printer exhaust line, as well as AC and dehumidifier units. 5x3: Nominal: 5" to 3" Actual: 4.85" to 3" 5x4: Nominal: 5" to 4" Actual: 4.875" to 4" No supports required. Hardware: 3x counter-sunk screws .1875" Max Shank Diameter .375" Max Head Diameter If you need a different size let me know. For a compatible shut-off valve see: