The 6 tread Sherpamatic is the range topping fixed height 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) 2.66. Open Height (m) 2.66 Rungs/Treads 6 Material Aluminium. Usage Type Heavy Duty. Warranty 5-Year. Standard PIRL NFP 93353 & PIR NFP 93352. Platform Height (m) 1.42. Open Depth (m) 1.81. Weight (kg) 25