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  • Sigma Engineered Solutions ProConnex Round Zinc-Plated Steel Knockout Seal
  • Sigma Engineered Solutions ProConnex Round Zinc-Plated Steel Knockout Seal

Sigma Engineered Solutions ProConnex Round Zinc-Plated Steel Knockout Seal

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The Sigma ProConnex knockout seals are used to close exposed holes in an outlet box or metal enclosure. These knock-out seals are of zinc-plated steel construction.