Southwire 4 in. x 1-1/2 in. Square Extension Ring

The Southwire 4 in. x 1-1/2 in. Square Extension Ring provides added depth and capacity to existing 4 in. square electrical boxes. Designed to accommodate additional wiring and devices, this extension ring ensures reliable performance for commercial and residential electrical installations. Constructed from durable galvanized steel, it features combination knockouts that offer versatile conduit entry and flexible wiring solutions. The rugged metallic design delivers lasting durability and corrosion resistance in demanding environments.