For 1/2in. knockouts, zinc plated steel, pack of 10
Item#: PI316
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The Devco® PI316 Knockout Seals and Hole Plug, for 1/2 in., zinc plated steel, pack of 10 knockout seals and hole plugs used to cap unused knockout holes in box or enclosure. The knockouts are zinc plated steel and the plugs are made of nylon.