Sigma's weatherproof two-gang extension ring increases the capacity of a weatherproof box. The rugged, die-cast construction prevents moisture penetration making the boxes suitable for wet, damp or dry locations. Extension rings are powder coated for corrosion resistance and include closure plugs, hardware and gasket. Sigma's weatherproof two-gang extension ring increases the capacity of a weatherproof box. The rugged, die-cast construction prevents moisture penetration making the boxes suitable for wet, damp or dry locations. Extension rings are powder coated for corrosion resistance and include closure plugs, hardware and gasket. Sigma's weatherproof two-gang extension ring increases the capacity of a weatherproof box. The rugged, die-cast construction prevents moisture penetration making the boxes suitable for wet, damp or dry locations. Extension rings are powder coated for corrosion resistance and include closure plugs, hardware and gasket. Sigma's weatherproof two-gang extension ring increases the capacity of a weatherproof box. The rugged, die-cast construction prevents moisture penetration making the boxes suitable for wet, damp or dry locations. Extension rings are powder coated for corrosion resistance and include closure plugs, hardware and gasket. Sigma's weatherproof two-gang extension ring increases the capacity of a weatherproof box. The rugged, die-cast construction prevents moisture penetration making the boxes suitable for wet, damp or dry locations. Extension rings are powder coated for corrosion resistance and include closure plugs, hardware and gasket.