Halex 96851 Rigid Reducing Washer, 1-1/2 x 1/2 in, 0.87 in ID, 2.44 in OD, Steel, 2/BAG

Use to reduce the size of the conduit hole knockout opening in a steel outlet box or other metal enclosure. Must use one inside the enclosure opening and one on the outside. UL listed and CSA certified.