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.
| Inside Diameter | : | 0.87 in |
| Material | : | Steel |
| Outside Diameter | : | 1.43 in |
| Trade Size | : | 3/4 x 1/2 in |
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