S K Metal Works offers Plastic Front Home UPS. S K Metal Works is an ISO 9001:2000 certified manufacturer and supplier of sheet metal cabinets and Plastic Molded Panels. This Plastic Front Home UPS is designed with H.120 mm x W.330 mm x L.300 mm and H.145 mm x W.330 mm x L.300 mm sizes. It comes in 500 and 1000 watt.