supply of self supported a type aluminium ladderself supported a type aluminium ladder,self supported a type aluminium ladder 18ft, main extrusion made up of aluminium alloy c section of size 66.6mm x 32mm x 3.18mm thickness, material used of high quality aluminium alloy 6351 gr ade he30, t6 temper, step made up of 64 base x 1 inch non slip, extra grip box type flat (mullion) step, do uble side climbing option, with platform on top, steps are riveted into the main sections, high quality leg gri p rubber shoes for top and bottom, supply along with test and warranty certificate. [ warranty period: 12 months after the date of delivery ] ] => limited