The design is refined. It consists of several parts, but requires only one printing material - PETG. The main part is very well reproduced from the original. The handle goes smoothly, a slight friction at the air adjustment bar is possible. The front consists of two parts, they connect by pressing, but to be sure, you can use a strong plastic glue. The diameter of the hole in the handle is 72mm (7.2cm). The handle retracts fully into the grille only if the adjustment bar is opened to the maximum. When the handle is extended (in the usable position), you can adjust the flow with the strip without any obstacles.