Defender Security S 4751 FIXED Window Guard, 31 in. - 54 in. x 21-1/2 in., Steel, Black, 4-Bar, NON-EGRESS Inside and outside mounting options Assists in preventing children from accidental falls through open windows Not for use in bedrooms without alternate emergency exit Meets New York City, New Jersey and Oregon Home Builders Association health and safety building codes 3-7/8 in. bar spacing