Insulated housing, box size HxWxD = 250x187.5x175mm, for NZM size 1, for NZM size 1, protection class 2, impact-resistant polycarbonate, switch door coupling rotary handle red/yellow included, mounting plate pre-drilled for switch and optional PE/N terminals, housing cover prepared for rotary handle, cover transparent smoke gray, wall mounting tabs, including cable entry flange at the top and bottom.