The PWB-250 series is the largest and highest capacity model of the PWB-200 series of wall boxes. This unit is approximately 14.25” x 7”x 4” and has three single gang knockouts and one IPS knockout to mount up to six single IPS plates. In addition, a removable pass-through enclosure provides an additional single gang knockout and can be used to isolate cables that the installer may need to passthrough the back box.