We manufacture different models of ladders. The B model has rectangular posts of 40x20x1.5 mm thickness. On the top posts is a hook to help hold the ladder in place.
The B ladder is manufactured to European Standard EN 131.
In addition, we have another model, the C Ladder, with a rectangular tube post of 50x30x1.5 mm thickness and rectangular rungs of 40x20x1.5 mm thickness.