ABB 1SL1200A00 4 Way grey System Pro E isolated consumer unit enclosure with transparent door. This MISTRAL65 series wall-mount enclosure is made of thermoplastic. It is fully compatible with a unified range of ABB products. As a result, terminal blocks, circuit breakers, switches, surge protective devices and many other components can be installed for a wide variety of applications. It has been designed to make installation easier, allowing you to set up high-quality consumer units that look great anywhere.