Horizontal mount, single gang in-use weatherproof cover is made of UV stabilized/flame retardant nonmetallic material. Includes: 1 duplex and 1 GFI receptacle plate, 1 base, 1 box gasket and screws. Has two 1/2" diameter cord openings in the base designed for maximum cord size of 12-3 SJ. 4 corner mounting holes are provided. Cover is noncorrosive, nonconductive, paintable, tamper-resistant, and securely snaps closed. Suitable for wet locations while in use. UL listed, CSA approved.