Steel City® Round floor boxes for power or communications, 68-series. Stamped steel, concrete-tight, fully adjustable. Electro-galvanized body and hardware. Interior and exterior levelling screws permit adjustment to meet finished floor. Shipped complete with expendable cap to prevent ingress of concrete during pour. 1/2, 3/4 and 1 inch knockouts, all bottom knockouts are accessible. Uses P60 series MopTite™ covers and carpet plate. 68-series floor boxes can be used for carpet or tile application.