0CP Concrete Ring Cover, Diameter: 4", 1/2" and 3/4" Knockouts, Steel

Concrete Ring Cover, Metallic, Type: Blank with (5) Knockouts: (3) 1/2" & (2) 3/4", Metallic.

Appleton and O-Z/Gedney metallic 4" octagon concrete boxes and back plates are widely recognized for quality, selection and ease of installation. They may be used as a junction box or a device box for switches, receptacles, GFCIs, etc. Manufactured of durable materials with consistent construction means easy installation, making all the difference in the speed and final quality of any wiring job.