Hubbell-Raco 689 3-1/2-Inch Deep 1 Gang Masonry Electrical Box with (8) TKO Eccentric Side Knockouts, 3-3/4-Inch x 1-15/16-Inch Rectangular shape neatly fits square cuts in concrete block, 3-3/4In. X 1-15/16In Device ears are formed inside the box. Ground is recessed on ear 22.5 cu. In. Capacity The product is ul listed Upc barcoded