The large comfortable 90mm treads, anodised finish & double handrails have made this 4 tread Comfort Step Ladder popular in the retail environment. The treads are spun-rung into the side of the stile giving the step extra strength, but still light enough to handle comfortably. Closed Height (m) 1.72. Open Height (m) 1.72 Rungs/ Treads 4 Material Aluminium. Usage Type Medium Duty. Warranty 5-Year. Standard EN131. Platform Height (m) 0.88. Open Depth (m) 0.95. Weight (kg) 6.5