HTS code 9902.15.03 covers "Fire escape ladders measuring 4.4 m or more but not more than 7.4 m tall when fully extended, tested to support 510.3 kg of weight and designed to be hung from a window measuring 15 cm or more but not over 25 cm; such ladders each composed of window brackets and rungs (stairs) of steel and rope of man-made fibers that connects the rungs to each other and to the window bracket; with slip resistant rungs and stabilizers, the foregoing for residential use, valued not over $34.50 each (provided for in subheading 7326.90.86)" under the US Harmonized Tariff Schedule. This is the official duty rate charged by US Customs when this product is imported into the United States, sourced directly from the U.S. International Trade Commission and refreshed daily.