Raco 691 2-Gang Masonry Box, Nongangable, 2-1/2" Deep, Twelve Concentric KO?..s | Cooper Electric
Appleton M3-350 - Steel Masonry Box 31/2 Deep
Thomas and Betts GW-335-G Masonry Box, 3 Gang, 3 1/2 Inch Deep, 1/2 Inch and 3/4 Inch Knockouts, Steel - Summit Electric Supply › Wholesale Electrical Supplies and Tools Distributor
2 Pcs, Masonry Box Extension Ring, One Gang, 3-1/2 in. Deep, Zinc Plated Steel - Silver - Overstock - 20180754
Garvin TBX-135 $99.99 Masonry Box Extension Ring One Gang 3-1/2" Deep | Zoro.com
One Gang Masonry Box, 2-1/2" Deep - Gangable, W/ Conduit KO's | Garvin Industries
Fastenal Industrial Supplies, OEM Fasteners, Safety Products & More
TB-235 Garvin Solid Masonry Box, Two Gang, 3-1/2 in. Deep-TB