Adapter for vacuum hose to plastic pipe included (item top left in product image) does not stay plugged into Dyson DC39 hose. I may be able to verify this as I know the Dyson has some fancy connectors (I used duct tape to secure them). Worst of all, the adapter has vents that can't be closed, so the suction power is too weak to be useful. UPDATE: I just found out they have a similar product for Dyson, I've ordered it and will see if it works. They claim that the vents are there to protect fragile items and I wish they would hold the user accountable for that. I'm going to be using this in our cars so I need all the suction power I can get.