The diameter of an interim piece is always a little wider than the diameter of the connectors, they have to fit to, to attach for example a transition clutch. It has exactly the same diameter as the tube-fan, so the both parts would lay edge on edge on one another. Due to the interim piece, they are connected.
To seal these connections you take a duct tape or a hose clamp.
|Product weight:||0,43 Kg|
|Dimensions:||35,00 × 35,00 × 9,00 cm|