This window guard is made of 0.048 inch thick carbon steel with 3-7/8 inch bar spacing. It features a non-egress design with an adjustable width from 23-1/2 to 38 inches and a height of 15-1/4 inches. The guard includes tamper-proof installation screws and complies with New York City and New Jersey housing codes. Price drops from $35.92 to just $25.14. Shipping is free for Prime members. Else, it adds $6.