CamdenBoss CNMB Series DIN Rail Mounting Enclosure Terminal Guards - CamdenBoss CNMB/3/TG508, A 5.08mm pre-drilled terminal guard suitable for use with CamdenBoss CNMB series DIN rail mounting enclosures. CamdenBoss 9-Pole Terminal Guard 5.08mm M3 CNMB/3/TG508