Wall box / wall boxes for exhaust hood

If the diameters of different manufacturers match, then you can use any of them. If they are hard plastic pipes, they are suitable for outdoors. It must protrude as much as the sleeves of the pipe to be slipped over are deep. At Weibel, you will find a suitable dimension drawing for each product. Usually, other suppliers have them as well. It is best if you draw it once with the individual dimensions when everything is nested together, along with the measurements of the kitchen and the extractor hood.