SIGMA - Sigma Engineered Solutions ProConnex Round Zinc-Plated Steel Knockout Seal [49154]

Seal off unused knockout holes efficiently with this durable and reliable solution. Crafted from zinc-plated steel, this 1-1/2" knockout seal offers excellent protection against dust and debris, ensuring your electrical boxes remain clean and secure. Designed for easy installation, it provides a snug fit and long-lasting performance, making it an essential component for any electrical project.