1-Gang 4 in. 21 cu. in. New Work Pre-Galvanized Metal Square Electrical Box Extension Ring (Case of 25)

Metallic outlet boxes provide innovative and efficient solutions for electrical rough-in. Innovative bracket designs simplifies the process of positioning and mounting electrical outlet boxes. Steel City switch and outlet boxes are protected from rust and corrosion by zinc-galvanizing. All clamps and other comp 1 nt parts are electrogalvanized separately, before assembly in the box, to ensure corrosion protection of every surface. Steel City galvanized finish meets the requirements of Underwriters Laboratories, Inc. and Federal Specifications.