extension ladder

extension ladder 1:Material:Aluminium. 2:Double step ladder.3:A table of the working heights for the Telescopic ladder(TS-4*4,TS-4*5,TS-4*6)models is as follows:Configuration Storage heightA-FrameExtension heightTS-4*4 1.39m(4ft 6 3/4 inch) 1.315m to 2.18m (4ft 3 3/4 inch to 7ft 1 3/4 inch) 2.69m to 4.52m (8ft 10 inch to 14ft 10 inch)TS-4*5 1.70m (5 ft 7 inch) 1.59m to 2.73m (5 ft 2 1/2 inch to 8 ft 11 1/2 inch) 3.30m to 5.75m(10 ft 10 inch to 18ft 10 1/2 inch)TS-4*6 2.20m(7ft 2 1/2 inch) 1.90m to 3.33m (6 ft 2 3/4 inch to 10 ft 11 inch) 3.98m to 7.20m (13ft 3/4 inch to 23 ft 7 1/2 inch) The ladders of our factory have achieved the certificates of EN131 and ANSI certificate ANSI certificate. We have excellent connections in the trade and fully experienced with the export business for this type of product. They are excellent in quality and safety to useing. we have a serises of ladders which coulde be made by customers' needs. After order confirmed,the delivery time will be very fast.