Rolling Stairs and Mobile Work Platforms by RollaStep
Work Platform - 7 Steps, 24 x 24" H-7254 - Uline
Rolling Warehouse Ladders | Warehouse Ladders on Wheels
Tri-Arc RWSR111242-XR 11-Step Gateway Rear-Exit Steel Rolling Ladder with 30" Deep Top Platform, Grip Strut Tread with Handrails, 24" Wide Steps: Amazon.com: Tools & Home Improvement
Rolling Platform Ladders - Metallic Ladder Corporation