The Wiremold G4047AX 4000 Series 2-Gang Cover Single Round Opening Fitting is a practical and versatile solution for managing electrical connections. This fitting is designed to accept both straight blade and locking single receptacles with face diameters ranging from 1.38 inches to 1.39 inches (35mm to 36mm). 4000 Series Raceway is the work horse of surface raceway systems. 4000 Series Raceway can be divided for multi-service applications making it ideal for applications requiring a large cable capacity and dual-service requirements. Commercial, institutional, and industrial applications benefit from the rigid steel construction and durable ScuffCoat™ finish of this raceway. 4000 Series Raceway is also ideal for municipalities that have code requirements calling for all steel construction or that prohibit nonmetallic cable management systems.