Weather-resistant extra duty while-in-use cover for GFCI/Decora. Device mount horizontal orientation. Made of polycarbonate material. Standard opening accommodates Decora® GFCI devices and additional adapter plates are included for duplex and single receptacle openings. Pre-mounted heavy-duty gasket provides a weather-resistant seal which protects from moisture and adds to ease of installation. Includes two inserts to cover the circular cord openings to prevent insects and debris from entering the cover while not in use. Safety lock feature.