ZNB1072 Features: * Extension ladder * 225 lbs duty rating * Medium duty commercial * Slip-Resistant Traction-Tred D-Rungs * 1-3/4"" traction-tred deeply serrated flat steps * ABS gold end caps and rail closures * Gravity/spring locks with spring-activated nylon flipper * Modified ""I"" beam interlocking side rails * Polypropylene continuous rope on 20" and up, patented * Free-swinging extruded shoes