The 4-6 tread Sherpascopic work platform is the range topping adjustable work platform. The 250mm spaced and 80mm deep treads afford comfortable climbing- much like a traditional stepladder, but with the added safety features. Closed Height (m) 2.38. Open Height (m) 2.38 Rungs/Treads 6 Material Aluminium. Usage Type Heavy Duty. Warranty 5-Year. Standard NF PIR NFP 93 352. Platform Height (m) 1.07-1.53. Open Depth (m) 1.75. Weight (kg) 28