G90 GALVANIZED STEEL MATERIAL; ANSI 61 GRAY POLYESTER POWDER PAINTED FINISH; 60 INCH; 6 INCH; 6 INCH; UL 870, CUL APPROVAL; NEMA 1 ENCLOSURE; SCREW COVER TYPE; LAY-IN WIRING GUTTER; (10) (1 INCH-1-1/4 INCH), (20) (1/2 INCH-3/4 INCH), (20) (3/4 INCH-1 INCH) CONCENTRIC KNOCKOUT KNOCKOUT(S); GSC1 MODEL