Hubbell Electrical Products Square Box - Steel 251

WELDED TYPE 0.0625 INCH PRE-GALVANIZED STEEL MATERIAL 4 INCH 4 INCH 2-1/8 INCH UL 514A, CSA C22.2 APPROVAL B BRACKET, CEILING/WALL MOUNTING 25 STANDARD PACKAGE 30.3 CU INCH CAPACITY (3) 1/2 INCH CONDUIT BOTTOM, (2) (1/2 INCH - 3/4 INCH) CONDUIT THREADED KNOCKOUT BOTTOM, (8) 1/2 INCH CONDUIT SIDES, (4) (1/2 INCH - 3/4 INCH) CONDUIT THREADED KNOCKOUT SIDES KNOCKOUT SIZE 17 KNOCKOUT(S) (2) BOTTOM, (3) SIDES KNOCKOUT LOCATION RACO[R], BOX-LOC[R], TKO[R] BRAND APPLICABLE STANDARD ANSI, NEMA OS1 APPLICATION INSTALLED IN WALLS OR CEILINGS FOR LIGHTING FIXTURES, SWITCHES OR RECEPTACLES