The variable scale of seca 216 has a range of 3.5 to 230 cm. A frame, 138 cm in length, has this variable scale inserted into it. The frame made of plastic is mounted on the wall st the required height. The product proves to be suitable for measurement of both children and adults, owing to the fact that the user selects the range displayed in the frame. The results are clearly shown in the window on the side of the rod. It is henceforth put in place, on the head piece, by the locking screw.