Product Description Plastic In-Use Weatherproof Covers are easy to install and include adhered gasket, mounting screws, base, cover assembly and inserts to meet the needs of a variety of applications From the Manufacturer The WP3100C is a single gang NEMA 3R receptacle cover that ensures compliance with 2008 NEC Article 406.8 (B) (1) which requires that 15 and 20 ampere, 125 and 250 volt receptacles installed in a wet location have an enclosure that is weatherproof whether or not the attachment plug cap is inserted. They also meet the 1999 NEC Article 410-57(b) and are designed to meet the 1999 NEC Article 210-60(b), which requires that receptacles installed behind beds in hotels and motels be protected with a suitable guard. The WP3100C is shipped with gasket, mounting screws, base and cover assembly and patented inserts. The single gang Flexi-Guard series provides inserts for a 16 different applications. The WP3100C is designed to mount horizontally or vertically. The patented insert design ensures flexibility by simply inserting the proper insert into the base and cover assembly. WEATHERPROOF - Meets UL Type 3R outdoor enclosure standards and complies with 2020 NEC Article 314.15 for damp and wet locations, making it a reliable option for outdoor use. EASY INSTALLATION - Includes a 1/8" (3 mm) thick, pre-adhered neoprene gasket with slits for mounting screws to simplify the installation process. HEAVY-DUTY CONSTRUCTION - Durable UV stabilized polycarbonate cover, mounting base, and inserts to provide long-lasting protection. VERSATILE - Features three inserts, including GFCI, standard duplex, Round and toggle,making it a great fit for various installations, and can be mounted both vertically and horizontally. SECURE FIT - Features a patented insert design and single gang NEMA 3R receptacle cover to ensure a secure fit for your outdoor electrical outlet. Max cord size: (2) #14 AWG or (1) #12 AWG. Each measures: 5.75 x 4 x 2.75