Alluminium Wall Extension Ladder As Per Is 4571/1977. A)lengh 10.9 Mtrs. After Extension And Close Height 6.1 Mtrs, B)width 380 Mm, C) Cross Section 66.6 Mm X 31.7 Mm X 4 Mm (Thick), D) Steps From 25.4 (1 Inch) Dia Floated Alluminium Pipe Fitted At Interval Of 300 Mm In Section Upto Complete Length, E) With Good Quality Accessories Pulley, Nylon Rope Of Sufficient Length, Rubber Pad, Safety Lock.