Defender Security SEGAL S 4770 Fixed Window Guard, 31-Inch -54-Inch x 21-Inch, 4-Bar, Adjustable Width, NON-EGRESS, Painted Bronze, Pack of 1 Mount inside window jamb or over the interior casing Features narrow 3-7/8 inch bar spacing to prevent small children from accidental falls through open windows Not for use in bedrooms or other sleeping quarters where alternate emergency exits are not present Meets New York City, New Jersey and Oregon Home Builders Association health and safety building codes Not for use on horizontal sliding windows, or hinged casement type windows