Knockout Seal, 3/4", Nylon, Black

For safer, more cost efficient installations, rely on Topaz's Knockout Seals, molded from strong, lightweight 6/6 nylon. Non-metallic construction guarantees virtually corrosion free, long-lived performance. Provides grounding to avoid exposure to electrical shocks commonly attributed the use of non-grounded metal blanks in a plastic box or enclosure. Available in gray in sizes from 1/2 to 2 Inch.