4-11/16 SQ SURF CVR, DPLX + GFI

Thomas & Betts 4-11/16" boxes, covers, and extension rings deliver professional-grade durability and installation flexibility for commercial and industrial electrical applications. Precision-engineered for secure mounting and reliable device support, this family of products offers a range of cover options and extension rings to accommodate deeper wiring needs and retrofit situations. Backed by Thomas & Betts quality, they simplify installation, ensure code-compliant performance, and provide a clean, finished appearance on every job.