EATON 1234 30-Amp 2-Pole, 3-Wire 250-Volts Heavy Duty Grade Flush Mount Power Receptacle, Brown NONE Imported Features heavy galvanized steel and mounting strap to resist corrosion. Has a glass reinforced nylon body 2-Pole/3-Wire features and a NEMA standard of 6-30R with 250-Volts Can fit one gang or two gang enclosures To be used with aluminum or copper wiring