... mobile step ladder round shape 2.0mm thick steel, powder coating Size:height400mm mobile step ladderround shape2.0mm thick steel, powder coatinghigh quality cartonpearl ... China factory direct price.metal rolling safety 2 step stool mobile step ladderhigh quality cold-rolled steel plate, undergone phosphorizationa and acid ... prevention,damp proof;diameter 400mm,height 400mm; mobile step ladder