Female Fit 4" Inch Metal Vent Duct Connector - Vent Extension - Galvanized Metal Pipe Connection - 4 Inch Dryer Vent Coupler - Metal Dryer Pipe Coupling - Rigid 4" Inch Metal Hose Extension

Perfect!!! It made my vent more secure! This piece is hard, it doesn't bend or dent easily at all. So it was just what I needed. Now I can clamp it down nice and hard for a very tight secure fit.

Not really sure what I need to review with this other than to say it fits the 4" ducts. Just take note this is meant to be the female side so the ends you are joining needs to be slightly smaller then 4"

Exactly what I needed to join an exhaust fan to an outdoor vent. Most couplers were a male to male, this female to female coupler was perfect!

Make sure you measure good because it is very strong metal. You will not be able to bend it or try to make it smaller if you order the wrong size. Great quality

This worked to join to dryer vent hoses.

I'm not sure why it works but it does. It's a perfect fit for connecting two 4-inch pipes together. Doesn't matter if one, both or none of sides are crimped. Not sure why the big box stores don't sell this piece. I've looked at many stores and tried different connectors and nothing has worked like this Amazon product does.

We ordered 3 sizes of these,did not use this one

Not all functions are available. I will recommend spending more money for a better quality product.