Convenient tension type fence to prevent cats from escaping from verandas or entryways. The vertical pole is not easy to swell, so the wind can pass through. The tension pole prevents scratches on floors and ceilings, and is easy to assemble and does not require tools. Installation Height: Tension pole height adjustable from 71.7 - 96.6 inches (182 - 245 cm). Mounting width 31-33.1 inches (78.5-84.5 cm) (bottom maximum width 30.3 inches (77 cm) + left and right gap, 2.8 inches (7 cm) each is added to the 1.4 inches (3.5 cm) Left and right doors can be opened and closed back It has a door opening function that can be left open at 90 degrees, making it convenient for you to take and remove items. The top and bottom of the center door lock prevents the cat from escaping, making it easy to open and close the door. (Improved fixing method for poles on both ends) After temporarily placing the poles to the ceiling height with the adjuster, you can drop the "tension lever" down to fix it firmly in place. If you feel a wobbling on the pole, such as when the installation height is high, you can turn the top socket adjustment knob (in the direction that it is loosen), the strength of the pole will be more firmly fixed.