Halex 3/4 in. Knock-Out Seals (4-Pack)

The 3/4 in. Knock-Out Seals (4-Pack) are used to cover exposed knock-out holes in steel boxes and other metal enclosures. Suitable for indoor and outdoor use. The seals are made with zinc-plated steel for strength.|Covers exposed knock-out holes|Corrosion-resistant zinc-plated steel construction|For use in steel boxes and other metal enclosures|Suitable for indoor and outdoor applications