Topaz TOPWRB450EXT 4" 4 Hole 3/4" Round Extension Weatherproof Box, Gray

Topaz ‘s Weatherproof 4-Inch Round Extensions in gray are the perfect companion for round boxes. They can expand their cubic capacity while enabling a flush finish. Features a 3/4-inch threaded hub for your specific installation needs. Constructed from corrosion-resistant copper-free aluminum they’re built for long-term durability. Both cULus listed, UL listed, and both 2011 NEC and NEMA 3R compliant for safe use in a variety of environments. The package comes complete with gaskets and mounting screws for easy installation.