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Nylon Knock-Out Seals Assortment (Fits 7/8" thru 2-1/2" Hole Diameter)Hillman Item #58173
An assortment of nylon knock-out seals from The Hillman Group. Nylon knockout seals effectively plug electrical knock-outs. They are molded from 6/6 nylon and are colored gray to resemble galvanized steel. Variants included in this assortment fit punched or drilled holes ranging from 7/8" to 2-1/2" in diameter. Full assortment contains six (6) refills comprised of Hillman item numbers #58174 - #58179.