In this guide, you'll learn about the different types of metal electrical box covers, their uses, configurations, materials, and how to choose the best one for your job. Choose from outdoor electrical box covers, exterior electrical. This category contains everything you need to keep your electrical and utility outlets safe with device boxes and accessories made from aluminum, iron and steel. Metallic boxes, enclosures, covers, extension rings and more from top brands such as ABB, Arlington, Steel City and Topaz can be found. Durable galvanized steel covers and device-mount plates, sized for standard 4" square metal-electric boxes (drawn or welded). Whether you need a blank cover for a spare junction, or a full device plate for switches, outlets, or GFCI, our collection delivers professional-grade performance for. Choose from our selection of metal outlet boxes and covers, weatherproof outlet boxes and covers, electrical wall plates, and more. AIYOTAR's 4-inch square metal cover plates are designed to fit most 4×4″ electrical boxes and octagonal configurations.