The RFB4-4DB is a 4-Compartment Box with 4 Duplex Receptacle Brackets. 12-3/4" x 10" x 3-7/16" (324mm x 254mm x 87mm). Fully adjustable. Tunneling from adjacent or opposite compartments only, (not cross compartments). Tunneling can be set to feed all four compartments from one conduit in a single-service application.