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

Worked great

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.

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!

Replacing dryer duct piping between wall and dryer with 90 degree "close" elbow and 4 in. x 2 ft. Semi-Rigid Aluminum Dryer Vent Duct with Collars. Needed a female-female adapter. This item is not aluminum like the other components being used. Rather, stiff metal, galvanized steel. Will not squeeze to grab using standard hose clamps. Therefore, took some real effort and time to fit the other components into this female-female adapter on both sides. Once fit jury-rigged for each side, used foil duct tape from Harbor Freight to secure the connection on each side -- without using hose clamps. Nonetheless, 100% needed this part for my installation and it worked. (Have not found a similar female-female adapter. Install might have been easier if I found could have found aluminum less rigid female-female adapter.)

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"

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.

Used to extend a piece of flex hose to a exhaust fan and it worked fine