supply of aluminium extension ladder , aluminium extension ladder 13mtr fully extended (8.00 mtr + 8.00 mtr) made of high tensile aluminium alloy c section 67x31x3.5 mm thickness confirming to he - 30 grade t-6 temper as per is:733 o f hindalco make steel, made of no slip aluminium alloy, corrugated fluted pipe of 28x3 mm dia. steps to be rivetted at distance of 250mm (10 inch) centre to centre, width of extension ladder min310 mm (approx), with aluminium lm-6 catcher to lock ladder at every rung, nylon rope and pulley, rubber shoes at the botto m safety, additional ms guide pipe mixed inside the ladder at 1 meter interval for stability of ladder, ladder fabricated by expanding and flaring runs with stiles of the ladder for 100% twist proof and unbreakable per formance. min load capacity-150 to 200 kg. make- skyward, sumer or sj [ warranty period: 30 months af ter the date of delivery ] ] , aluminium extension ladder 13mtr fully extended (8.00 mtr + 8.00 mtr) made of high tensile aluminium alloy c section 67x31x3.5 mm thickness confirming to he - 30 grade t-6 temper as per is:733 o f hindalco make steel, made of no slip aluminium alloy, corrugated fluted pipe of 28x3 mm dia. steps to be rivetted at distance of 250mm (10 inch) centre to centre, width of extension ladder min310 mm (approx), with aluminium lm-6 catcher to lock ladder at every rung, nylon rope and pulley, rubber shoes at the botto m safety, additional ms guide pipe mixed inside the ladder at 1 meter interval for stability of ladder, ladder fabricated by expanding and flaring runs with stiles of the ladder for 100% twist proof and unbreakable per formance. min load capacity-150 to 200 kg. make- skyward, sumer or sj [ warranty period: 30 months af ter the date of delivery ] ]