1) Oval aluminum climbing ladder is one of the developed aluminum staircases in our company
2) It is elaborated by 60*30*4 elliptical tube
3) According to the customers’ need, the ladder can make into stationary ladder or folding ladder, uses of air spring for folding climbing ladder, flip light
http://www.jlfiretruck.com/aluminum-staircase/other-aluminum-staircase/elliptical-tube-aluminum-staircase.html