1/2 & 3/4 BOX EXT RING 21CUB STL

1/2 & 3/4 BOX EXT RING 21CUB STL - Electrical Box Extension Ring This Steel City 1/2 & 3/4 Box Extension Ring provides a 21 cubic inch capacity for electrical wiring applications. Designed for use in electrical distribution and lighting solutions, it extends 4-inch square outlet boxes by 1-1/2 inches deep, facilitating additional wiring space. The ring features 12 knockouts sized for 1/2 inch and 3/4 inch conduits, allowing versatile conduit entry options for wire and cable routing. Constructed from pre-galvanized steel, it offers durability and corrosion resistance suitable for commercial and industrial installations. Specifications Material: Steel Color: Silver Cubic Capacity: 21 cu in Size: 4 in Length x 4 in Width x 1-1/2 in Depth Number of Knockouts: 12 Number of Outlets: 1 Manufacturer: Steel City Manufacturer Part #: 531511234UB Product Weight: 9.5 lbs Standards: UL E2969 Features Pre-galvanized steel construction for corrosion resistance Eccentric knockouts for 1/2 inch and 3/4 inch conduit compatibility Extends 4-inch square outlet boxes by 1-1/2 inches for increased wiring capacity Suitable for use in wire management and connectivity installations Complies with UL standards for electrical box extensions Downloads & Links Spec Sheet Spec Sheet