The 1 in. Knockout Seals (2-Pack) are designed to cover exposed knockout holes in steel outlet boxes and other metal enclosures. These steel seals are zinc-plated for corrosion resistance.
The 1 in. Knockout Seals (2-Pack) are designed to cover exposed knockout holes in steel outlet boxes and other metal enclosures. These steel seals are zinc-plated for corrosion resistance.