Topaz Lighting E4512 4" Square Box Extension Ring, 1-1/2" Deep, Galvanized Steel

Topaz Lighting E4512 4" Square Box Extension Ring, 1-1/2" Deep, Galvanized Steel

The Topaz Lighting E4512 is a 4" square galvanized steel box extension ring engineered to add depth and wiring volume to standard 4" square electrical boxes. Measuring 1-1/2" deep and featuring both 1/2" and 3/4" knockouts (KO), this extension supplies the additional wiring space needed for device installations, junction applications, and conduit entry points across commercial and residential electrical systems. Fabricated from durable galvanized steel and supplied in a 100-pack carton, the E4512 is built for consistent, high-volume performance on professional job sites.

Key Features

• Trade Size: 4" square footprint that mounts securely and flush to standard 4" square electrical boxes.
• Depth: 1-1/2" deep extension ring adds wiring volume and additional device mounting space to existing box installations.
• Knockout Configuration: Includes both 1/2" and 3/4" knockouts (KO) to accommodate a variety of conduit sizes and connector types.
• Durable Construction: Fabricated from galvanized steel for reliable corrosion resistance and long-term structural integrity in demanding electrical environments.
• Bulk Packaging: Supplied in a 100-pack carton, ideal for contractors and electricians on large-scale commercial or residential projects requiring consistent, high-volume supply.

Technical Specifications

• Product Size: 4"
• Product Type: Conduit & Raceway
• Product Group: Conduit & Raceway
• Product Subgroup: Conduit & Raceway

Typical Applications

• Commercial and Industrial Electrical Box Extensions
• Residential Wiring and Device Box Depth Additions
• Conduit and Raceway Entry Points via 1/2" and 3/4" Knockouts
• Junction Box and Pull Box Installations
• New Construction and Renovation Electrical Projects
• High-Volume Contractor and Electrical Supply Applications

Why Topaz Lighting?

Topaz Lighting manufactures the E4512 box extension from galvanized steel, delivering the corrosion resistance and mechanical strength professional electricians rely on for demanding installations. The dual 1/2" and 3/4" knockout configuration offers installation flexibility across a wide range of conduit systems and fitting types, while the 4" square, 1-1/2" deep profile fits seamlessly with standard box installations. Supplied in a 100-pack carton, the E4512 is built for contractors and electricians who need consistent, code-compliant components at scale.