Product Description

SQUARE BOX EXTENSION RING TYPE; STEEL MATERIAL; 4 INCH; 4 INCH; 2-1/8 INCH; UL 514A/514B/514C APPROVAL; 25 STANDARD PACKAGE; 30.3 CU INCH CAPACITY; (8) 1/2 INCH SIDE, (4) 3/4 INCH SIDE KNOCKOUT SIZE; 12 KNOCKOUT(S); APPLICABLE STANDARD FEDERAL SPECIFICATION W-J-800E, NEMA OS-1