Robuta

https://www.crescentelectric.com/product/126991/rw20-reducing-washer-2-12-x-1-12-in-for-use-with-imcrigid-conduit-steel-plated RW20 Reducing Washer, 2-1/2 x 1-1/2 in, For Use With IMC/Rigid Co | Crescent Electric Supply Company