SIGMA - Sigma Engineered Solutions ProConnex Round Zinc-Plated Steel Knockout Seal [49153]

Seal off unused electrical box knockouts with this durable, zinc-plated steel knockout seal. Designed to provide a secure and reliable closure, it ensures safety and protection from dust and moisture infiltration. Perfect for both residential and commercial applications, this knockout seal combines practicality with ease of installation, making it an essential tool for electricians and DIY enthusiasts alike.