General use enclosure for retrofits, small inverter disconnect, PV disconnect, AC or DC distribution or? Used all around the world. ¾ & 1 knockouts each end. 3 x 3 x 7. This is the enclosure only, with DIN rail - you will also need to get the appropriate breakers for what you are using it for. If used as an array combiner you will also need to use a couple of bus bars, such as these.