Minimum 122cm (not 116). Screws cannot be unscrewed by hand (as in the video). Moreover, there is no groove for the screwdriver on the outside. And it is very difficult to grasp with pliers. If he jumps down, you scratch him. It is worth ordering an extra set of screws. Once you set the size, the excess must be cut off, as only 22cm extra can fit. So if you cut it to a minimum length, you can use it between 122cm and 144cm. I think it's enough. Material and design are very good.