Werner 40 ft. Aluminum Extension Ladder is a heavy-duty industrial ladder designed for durability and safety. It features deeply serrated, 1-3/4 inch wide flat type rungs that provide secure footing. The modified I-beam interlocking side rails are 3 inches wide, ensuring strong support. This ladder includes mar-resistant end caps and rail closures to protect surfaces. Its smooth operating pulley is paired with a polypropylene rope for easy extension and retraction. Extruded rung locks with spring-activated nylon flippers provide reliable locking. The shoes rotate easily and lock into spur position for stability on grass and dirt. This ladder is UL listed and labeled, meets OSHA standards, and carries a Type I heavy-duty industrial rating with a 250 lb. load capacity. It is available in various heights, with the 40 ft. model ing a maximum working length of 35 ft. and equipped with rope and pulley for convenience. Model Number: D1340-2