Morris 21797 Type S Knockout Seal with Screw and Bar, 3", 1-Pack 3" June_2023_update Diameter: 3/8" (10mm) Binding Capacity:

Diameter: 3/8" (10mm) Binding Capacity: 55 Sheets Rings: 21-Ring Length: 30cm

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Morris 21797 Type S Knockout Seal with Screw and Bar, 3", 1-Pack 3" June_2023_update Diameter: 3/8" (10mm) Binding Capacity:Morris 21797 Type S Knockout Seal with Screw and Bar, 3", 1 Pack Type S Knockout Seals with Screw & Bar Set screw bar type knockout seals are inserted in open box knockouts to protect exposed wires. Set screw bar type knockout seals are inserted in open box knockouts to protect exposed wires. Used in standard, air tight or dust tight applications. Pre assembled screw and backer bar slides on open knockout holes without removing box devices or covers.