Raco 187 Extension Ring (Gray, Steel)

RACO extension ring, drawn, 12 knockouts, (8) 1/2 in Conduit side, (4) 3/4 in Conduit side knockout, 4 in length, 4 in width, 1-1/2 in depth, square shape, surface mounting, 22.5 cu-in capacity, steel, Gray, galvanized, UL E195978. RACO 4 inch square x 1-1/2-inch deep, drawn, extension ring to attach to a switchbox. Each side has two 1/2 in. And one 3/4-inch knockout. The ring provides additional cubic capacity, and a means for connecting surface mounted Conduit raceways.