Aluminium Step Trolley Ladder is a self-supported ladder available with channel sections on sides and steps. Shree Modi Material Handling Co. Supplies Aluminium Step Trolley Ladder. Shree Modi Material Handling Co. Is the manufacturer of hydraulic pallet trucks, scissor lift table, platform trucks, material handling trolleys, Hydraulic Stacker, plastic pallets, Hand Carts, Castors and Wheels. The Aluminium Step Trolley Ladder comes in various heights ranging from 6 feet to 12 feet.