I wonder if anyone has come across this before and can advise me please? I had a Wren kitchen fitted and the fitter didn't fit the extractor flue so I haven't been able to use my extractor. Now I can see why!! It seems nigh on impossible to find the right parts? The Bosch extractor is E-Nr: DHL535BGB/03 FD: 9704 Z-Nr: 00197 Type: HBD-BX51-8 I have attached a photograph of the part that appears in the extractor cupboard. And there is a gap of about 30cm that needs to be joined to meet the 120mm plastic flue that goes across the tops of the cupboards and through the outside wall. (I have a flexible hose ready to fit.) The 120mm flue needs a male to female connecting part. My question is, as the white part in the photo has some notches in it, does this need a special connector? (Sorry, I am not sure about the correct terminology!). Currently, there is nothing to connect the 120mm flexible hose to. And what about those notches? Does that indicate that there is a specific part that clicks in place? So confused. If anyone can provide me with some information as to how to resolve this, I would be very pleased! Phoebe.