Now you have available in PEV Grow, metal reducers with different diameters. Sometimes the diameter of the extractor does not correspond to the size of the filter, so this coupling will help you.
The metal reducer will also serve to remove two tubes from one if you need to reduce the diameter.
You will be able to configure the extraction according to your needs.
Available in sizes from 100mm/125mm. up to 315mm/250mm.