The Middle Atlantic Products M-20A MPR 20A Module is a 4" duplex module designed for power distribution. With a maximum input current of 20A, this product is compatible with other Middle Atlantic Products and is ideal for managing power distribution efficiently. The module is compact, measuring 9" in length, 3" in height, and 3.5" in width, making it easy to install and use in various networking setups. This product also comes with a California Prop 65 warning, indicating its potential for causing harm if not handled properly.