supply of self supporting aluminium foldable ladder of light weight, and heavy duty. material ofladder as per is-733-1982 or latest. hindalco aluminium section he-30 alloy c channel size 66mm x 31mm x2.5mm. step size - 2.5 inch flat steps. weight load capacity - 150 kgs. platform size - 14 inch x 8 inch. warranty- 5 years. in one set following sizes included (1) size - 8 feet height - 7 nos. & (2) 10 feet height - 11 nos.