Electrical Box, Masonry, 89.8 cu in, 4 Gang Price For: Each Number of 1/2" Back Knockouts: 4 Standards: UL 514-A Listed, File E195978 Item: Electrical Box Box Type: Masonry Bracket Type: - Number of 1/2" Side Knockouts: 20 Clamp Type: - Number of 3/4" Side Knockouts: 20 Number of Gangs: 4 Number of 3/4" Back Knockouts: 4 Material: Galvanized Steel NEMA/IEC Frame: - Nominal Depth: 3-1/2" Color: Silver Nominal Length: 3-3/4" Capacity: 89.8 cu. in. Nominal Width: 7-13/32" Country of Origin (subject to change): Mexico