Hubell Twist Lock 3 Wire 250 Volt 20 Amp Male and Female Wall Receptacles Hubbell male and female receptacle / 3 wire application / You can use 220/250 insulated wire on this item / Female receptacle wall base plate measures 5" x 4 1/4" 250 volt / Twist lock / Heavy duty male and female receptable / Plug end measures:Width: 1 3/4" 20 amp / This item was never used / 250 volt twist lock male and female plug end 3 wire application / This item can be used on any 220/250 volt device This item does not come in factory box / This item is used in business, factory, residental, commmercial