Supply Of , Supply Of Aluminum Self Support Ladder Of Size 20 Feet, 3Mm Thickness C Section 66X32x3.18 Mm Thickness Of He-30 Grade, T6 Temper. Steps Shall Be Made Up Of 26 Mm X 3 Mm Thickness Non Slip, Extra Grip Round Corrugated Fluted Pipe Steps .Material For Aluminium Pipe To Is 738 Latest. Ladder Shall Be Similar To Model No.Djssl-20 Of Dj Industries, Chennai , Sumer, Delhi, S K Ladder, Delhi.