This 3 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) 1.42. Open Height (m) 1.42 Rungs/ Treads 3 Material Aluminium. Usage Type Medium Duty. Warranty 5-Year. Standard BS EN131. Platform Height (m) 0.58. Open Depth (m) 0.9. Weight (kg) 5