all UPSs i had were plastic cases. ah, sorry... i wrote PSU... my bad. not a PSU, but one of those UPS, or no-break. more specifically the APC ones that are ch

all UPSs i had were plastic cases. ah, sorry... i wrote PSU... my bad. not a PSU, but one of those UPS, or no-break. more specifically the APC ones that are cheap and have USB data port and Ethernet/modem filtering.