Knockout Plug, Installation Accessories, Material Steel, Silver Color, For Use With Electrical Boxes and Enclosures, Covers Exposed Knockout Holes Function, , Length 1.08 in, Width 1.08 in, Depth 0.36 in, Number of Gangs 0, Conduit Size (In.) 1/2, Number of 1/2 In. Side Knockouts 0, Round Design, Includes Mounting Screws