Cable from the Warsaw Radio Mast

Origin
The Warsaw Radio Mast was the world's tallest structure until its collapse on August 8, 1991. The mast, which was designed by Jan Polak, was 646.38 metres (2,120.7 ft) tall. Its construction, started in July 1970, was completed on May 18, 1974, and its transmitter entered regular service on July 22 of that year. It was located in Konstantynów, Gąbin, Poland, and was used by Warsaw Radio-Television (Centrum Radiowo-Telewizyjne) for longwave radio broadcasting.

Effect
The cable, which is normally 10 feet long, can increase its length up to 2,120 feet long. It can also transform from flexible to rigid. The only downside is that it is extremly heavy. When able, it is used like Arthur Claude Darby's Rope.