Dundas Jafine SEVZW Soffit Exhaust Vents Fits 4-Inch, 5-Inch and 6-Inch Duct Compatible with 4,5, or 6 inch ducts Ideal for exhausting bathroom or kitchen fans Includes a Frost free damper system Ideal for exhausting bathroom and kitchen fans through the soffit of your home Frost free damper system, stylish flush mount design and leak proof collar to duct connection to prevent moist air back draft The front facing can also be painted to match your soffit color This product fits 4, 5 and 6 ducts Outer grill and air pressure activated flap with stainless steel spring to help prevent pests from entering your home Ideal for exhausting bathroom and kitchen fans through the soffit of your home Frost free damper system, stylish flush mount design and leak proof collar to duct connection to prevent moist air back draft The front facing can also be painted to match your soffit color This product fits 4, 5 and 6 ducts Outer grill and air pressure activated flap with stainless steel spring to help prevent pests from entering your home