1) We developed square tube contraction type aluminium alloy climbing ladder which is turning and turning mechanism according to customers’ need
2) Square tube shrinkable aluminum staircase is made by square tube materials, it is pulled out by turning institution. Just set aside to the truck body closely when needn’t it. It is suitable for most truck styles
http://www.jlfiretruck.com/aluminum-staircase/square-tube-aluminum-staircase/square-tube-shrinkable-aluminum-staircase.html