KNOCKOUT SEAL 3/4" 50PK *Brand Name: Sigma Engineered Solutions *Sub Brand: ProConnex *Shape: Round *Material: Zinc-Plated Steel *Height: 0.31 in. *Width: 1.15 in. *Product Type: Knockout Seal *Application: Closure of Unused Box Outlets *Depth: 1.22 in. *Color: Silver *Number in Package: 50 pc. *Trade Size: 3/4 in. *Discovery ACC, NBR, SUP