ABS or Polystyrene material casings with front panel. Standard colours are RAL 9004 and RAL 7035. Each half-shell has an integral mounting bolts for the PCB. It has a matte surface finishing. It is secured with screws with legs. KM-56 and KM-56B casings with a suitable area for a label at the cover. The KM-56B also has an electrical socket.