Hubbell Electrical / RACO 911-6 4 Inch Square Extension Ring; 4 Inch Width x 1-1/2 Inch Depth x 4 Inch Height, Drawn Steel, 22.5 Cubic-Inch

Detailed Description: Hubbell Electrical / RACO® Square box extension ring in red color is made of steel and features drawn construction. It measures 4 Inch x 1-1/2 Inch x 4 Inch. Box extension has a capacity of 22.5 cubic inches and fits to 4-Inch square box. It has eight 1/2-Inch and four 3/4-Inch side knockouts. It features combination screw heads that helps in faster installation. Extension ring acts as an outlet box for surface conduit or used when extra cubic capacity is required for additional wiring. It is UL listed.