Hubbell weatherproof cover, Blank, round, flat, Hubbell, 4 in diameter, 1/16 in thickness, metal, Gray, powder coated, horizontal/vertical mounting, NEMA 3R, includes: installation hardware, gasket, multi-lingual instructions, CSA certified, UL listed, for 4 in Splice boxes. Bell weatherproof round covers are designed to protect the contents of weatherproof Splice boxes bell round covers are for use with 4 inch round Splice boxes round covers have a flat, Blank design.