The NuTone Built-In Food Center Power Unit Central System Model 251 Motor Base is a high-quality inverter designed specifically for NuTone 251 model central systems. It is an electric motor that operates at 120v, featuring a smooth beige finish and being made of durable metal materials. This reusable motor base is suitable for central systems and comes with a single unit in the pack, making it easy to install and providing reliable power for your kitchen appliance needs. With its compact dimensions of 7 inches in width, 4 inches in depth, and 4 inches in height, this NuTone motor base is a practical and efficient component for your kitchen. It was in a camper I'm remodeling. i ran it and it works..