Check the listing for details. Southwire New and Old Work Rectangle Galvanized Steel Box Extension Ring. Condition: New. Listed at 8.95 USD. Southwire New and Old Work Rectangle Galvanized Steel Box Extension Ring Switch box extension rings are used to support 2 or more toggle switches, duplex devices, decorative pieces, and a variety of electrical outlets. The multi-device boxes are ideal for commercial applications where multiple-point lighting controls are necessary. Its telescoping design adjusts to the proper wall depth.Telescoping design adjusts to proper wall depthHardware is included with this productAdjustment range from 1/4 in. x 1 in.Both UL and RoHS compliant for safety Specifications:Brand Name: SouthwireWork Style: New and Old WorkShape: RectangleMaterial: Galvanized SteelProduct Type: Box Extension RingWidth: 1.75 in.Height: 4 in.Depth: 1 in.UL Listed: YesDiscovery: Express,Convenience,Core,Super