The large comfortable 90mm treads, anodised finish and double handrails have made this 12 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) 3.67. Open Height (m) 3.67 Rungs/Treads 12 Material Aluminium. Usage Type Medium Duty. Warranty 5-Year. Standard EN131. Platform Height (m) 2.64. Open Depth (m) 2.18. Weight (kg) 20.5