200 to 150 mm / 8" to 6" Inch - White Plastic Duct Reducer Adapter - Connector Fitting Pipe Increaser Reducer Cone for HVAC Ventilation Systems, ABS Plastic, PVC Pipe

OK, this is a great solution to duct reduction. Measurements are spot on, only one thar fit as expected.

Well I have installed it and it works. But it was not easy for my application to install a 6 inch booster fan inline with 5 inch furnace/AC galvanized steel venting. I bought one for each end of the fan. The 6 inch plastic adapter end is too large for the fan I bought, and the 5 inch plastic adapter did not fit with either the female or male end of the vent piping. So I used foam weatherstripping inside the 6 inch end to make a snug fit with the fan, and I used a small section of corrugated aluminum 5 inch pipe venting to go between the fan and the adapter, held with aluminum duct tape. It works but not the easy job I was expecting. It was not available at the time but now I would try the galvanized steel adapter instead. Good luck!

Riduttore x tubi cappa buono.

No es como se muestra en la imagen, tiene una lengüeta en el lateral que molesta bastante.

We moved into a unique rental and after a few failed trips to Home Depot and Lowe’s to find an adapter for our new dryer this did the trick. We needed something that was slim and fit in a smaller space with the ductwork. Fit our attachment perfectly and has held up for our dryer