This 4 Tread Professional step ladder is ideal for trade & light duty use with an extra large standing platform 50% bigger than standard stepladders, with strong deep treads & twin handrails for comfort & security. Closed Height (m) 1.66. Open Height (m) 1.66 Rungs/ Treads 4 Material Aluminium. Usage Type Medium Duty. Warranty 5-Year. Standard BS EN131. Platform Height (m) 0.8. Open Depth (m) 0.94. Weight (kg) 6