supply of aluminium extension ladder 11maluminium extension ladder 11m,aluminium extension ladder 11m. aluminium ladder extension wall support ladder 24/40 as per specif ication given below - aluminum alloy wall support extension ladder proved with top hand rails and platform steps made of 26* 3 mm round corrugated flutted pipe, main extrusion made up of aluminum alloy section 66*32*4mm thickness, of he30 grade and t6 tempe. closed height 24 feet, additional msguide pipe fixed inside height 40 feet, additional msgui de pipe fixed inside of the ladder at 1 mtr internal for stability of ladder arms. [ warranty period: 30 months after the date of delivery ] ]