A 16-Foot extra heavy duty Aluminum shelf ladder. Duty rating of 300-Pound. For all demanding industrial applications. Steps are level when the ladder is set at 18 Degree. Rubber Bumper - Ladder has parallel sides with thick rubber bumpers extending 6-Inch down the side rails for protection of landing surface and stability. Two pair of heavy duty steel gussets support bottom step Aluminum angle feet with thick rubber tread on both legs to provide sure footing and stability. Feet can be replaced when necessary. Double-Rivet Step Construction - Each step secured with six, large headed, semi-tubular steel rivets for maximum strength. This ladder is ideal for getting to shelves with Narrow aisles when standard ladders will not fit.