supply of aluminium extension ladder 11maluminium extension ladder 11m,aluminium extension ladder 11m. aluminium ladder extension wall support ladder 24/40 as specificat ion 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 t6 tempe closed height 24 feet additional msguide pipe fixed inside height 40 feet additional msguide pipe fixe d inside of the ladder at 1 mtr internal for stability of ladder arms. make s.j ladders or similar [ warranty period: 30 months after the date of delivery ] ]