When you need to contain a volume of various wires and cables in an easy-to-install design, this raceway is the perfect choice. Spacious interior is ideal for organizing power and telecommunications in a typical home office setting. Paintable and stainable. This Extra Deep Outlet Box is for oversized wiring devices such as fan speed controls, dimmer switches and GFCIs (1-3/8-inch). For installing speed controls for ceiling fans dimmer switches, standard switches and outlets. 1-3/4" deep.