5 Step Narrow Aisle Ladder with 15" Top Step ($745 new + shipping) Slim design fits well when warehouse space is an issue. 20" wide expanded metal steps. 60° incline. One 5" front swivel caster and two 6" rear rigid casters. 400 lb. capacity. More info here: https://www.uline.ca/Product/Detail/H-5078/Ladders/5-Step-Narrow-Aisle-Ladder-with-15-Top-Step