The Telescope Bar expands and contracts to allow for moves that would be much more difficult (or impossible) with just a normal bar. It is constructed out of aluminum and is 1.25" in diameter. This obstacle is 40" long when in the closed position and 60" long in the open position. The Telescope Bar can be paired with countless other obstacles such as our Floating Skyhooks, a salmon ladder, or Ninja Rings and Nylon Straps. It is not recommended for outdoor use.