4" Inch Flexible Duct - 0.82 to 1.64 ft Length - Corrugated Aluminum Ducting Connector - Galvanized Steel End Sleeves - Washer and Dryer Exhaust Duct - Dust Collection Hose - Dryer Duct

This dryer vent is amazingly good

Good quality.

Did what I needed done. Connect my downdraft stove to ducting.

The openings on this supposed dryer vent pipe, are the exact same diameter as those on the dryer and discharge, consequently, unless you severely crimp and thereby destroy its efficiency to sequester lint, it will not fit either end. Useless for this application!

This device claims to be male both ends, but it does not fit the female (crimped) end of an 8” duct. Rather than send it back, I had to use needlenose pliers to increase the crimp on the duct, then screw the pieces together as they tended to slip out. Since it’s just a range hood exhaust duct, it’s not I big deal—other than being a lot of work—but might not be acceptable in other applications.

I’m really disappointed because I bought this and it says it’s 4 inches and it’s not quite 4 inches so it will not go on the outside of the dryer vent that is in the wall. It fits on the dryer itself very well.

Don't waste your time and money. You can't stretch the duct without tearing no matter how patient you are. It is just a very poor quality duct.