Hub Size : 1/2 In Number Of Knockouts : 3 Knockout Size : 3-1/2 In Number Of Gangs : 2 Cubic Capacity : 117.3 Cu-in Dimensions : 4-9/16 In L X 4-5/8 In W Material : Metal Color : Gray Finish : Powder-Coated Includes : Closure Plugs, Ground Screw And Mounting Lugs