A tenacious the chamber Bay PU material. Tube lightweight wear-resistant, corrosion-resistant, hardened resistance, bending resistance, resistance to cracking, volumes still put it well in cold environments. The cabinet has automatic locking device and automatic retraction, excellent telescopic design allows a small amount of space, and make the site cleaner, easier to use. The outer protective device effectively avoid the wear and tear of the trachea and prolong life. Can buy 180 swing, scope of work, using a variety of processing plant can be flexibly fixed on a wall or ceiling.