Stainless Steel 4" Duct Wall Exhaust Vent Hood – Exterior Louvered Flapper Cover

4" rear round duct connection. Stainless-steel wall exhaust vent for bath fans, dryer venting, range hoods, or HVAC intake. Exterior faceplate approx.7" × 7". Vent hood only (no screws or gasket). Gravity-close vent louvers — no power required.