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The Minerallac Cully 90068 is a 3-piece circular knockout seal designed for four-inch conduit applications. This steel knockout seal is pre-galvanized and zinc plated, providing durability and corrosion resistance. It is vital for sealing open knockout holes to protect exposed wires from damage.
The Cully knockout seal is efficient in maintaining protective barriers in electrical setups.
We pulled together the parts most installs need for this unit, plus a few add-ons worth a look. Check what you need — nothing here blocks checkout.
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