Sigma Engineered Solutions ProConnex 2 to 1-1/2 in. D Zinc-Plated Steel Reducing Washer For Rigid/IM - 3172913
Sigmas Reducing Washers are used to decrease the size of a knockout in a steel outlet box or metal enclosure. Two of these zinc-plated steel reducing washers are required for each knockout. They are embossed for self-centering and easy installation.