Electrical Box, Masonry, 67.3 cu in, 3 Gang Price For: Each Number of 1/2" Back Knockouts: 3 Standards: UL 514-A Listed, File E195978 Item: Electrical Box Box Type: Masonry Bracket Type: - Number of 1/2" Side Knockouts: 16 Clamp Type: - Number of 3/4" Side Knockouts: 16 Number of Gangs: 3 Number of 3/4" Back Knockouts: 3 Material: Galvanized Steel NEMA/IEC Frame: - Nominal Depth: 3-1/2" Color: Silver Nominal Length: 3-3/4" Capacity: 67.3 cu. in. Nominal Width: 5-19/32" Country of Origin (subject to change): Mexico