Southwire 4 In. x 4 In. Steel Square Extension Ring

4 In. square extension ring. Ideal to be added to junction boxes to increase wiring capacity. This provides access for additional conduit runs and electrical wire. It prevents the need to remove old conduit boxes and wiring from circuits when additional capacity is needed. Includes (6) 1/2 In. knockouts and (6) 1/2 In. to 3/4 In. CKO's. Additionally, these rings are UL and RoHS compliant.