Hubbell 54531 Concrete Ring 4 Inch, Steel, 2 Inch Deep, 25-Pack, CSA Certified

Hubbell 54541 Concrete Ring 4 Inch, 30 Cu. In., 2-1/2 Inch Deep, CSA Certified, Steel

Hubbell 54561 Concrete Ring Box 4 Inch, 42 Cu. In. Capacity, 3-1/2 Inch Deep, Steel, CSA Certified

Hubbell 54571 Concrete Ring Box, 4 Inch Deep, Steel, CSA Certified, 48 Cu. In. (10-Pack)

Hubbell CBA Concrete Ring Adaptor for Octagonal Extension Rings, CSA Certified

Hubbell 54551 Concrete Ring Box 4 Inch, 36 Cu. In., 3 Inch Deep, Steel, CSA Certified

Hubbell 54591 Concrete Ring Box 4 Inch, 72 Cu. In., 6 Inch Deep, CSA Certified, Steel

Hubbell 54581 Concrete Ring Box 4 Inch, 60 Cu. In., 5 Inch Deep, Steel, CSA Certified (10-Pack)

Hubbell 5456112 Concrete Box Ring 4 Inch, 42 Cu. In., 3-1/2 Inch Depth, Steel, 20-Pack