calimaero® HWG 4" Dryer Vent Cover Outdoor Walls - Cowled External Extractor Fan Vent Dryer Cover - Robust and Weatherproof Stainless Steel Outdoor Dryer Vent Cover - Fits Only with Metal Pipes

The gasket is 1/4" thick while the cavity is 1/2" deep. Odd until you realize the gasket has a cavity designed for inserting the metal frame (not set inside the cavity). Its a bit tricky to get it to stay in place - once you do, suggest leaving it overnight so it'll stretch a bit. I used gorilla glue in the cavity, then held the rubber in place with 4 large binder clamps until it adhered to the metal edge. Installing over a flat surface it fine, but over bricks, planks, etc., the provided gasket worthless - just get some 5/8" thick rubber and fill that cavity or silicone it in place.The vent itself is rugged and it fits VERY snugly inside a 4" duct. If it's too snug to enter the duct (a problem I had), flatten the 3 holding clips a little. A ring of silicone sealant inside the duct prior to inserting the vent provides a better exhaust seal and eases installation. I also filled teh 1/2" cavity with silicone to firmly seal the vent to the duct. This will force the exhaust air through the port, avoiding moisture build-up against the wall.

Great replacement for the plastic vent, which was falling apart after only a few years.Easy to install, even though getting the rubber gasket in place took a bit of an effort.

The rubber seal that interfaces between the vent's outer edge and the house sheathing did not fit well at all. It was too small, required a lot of stretching and kept pulling off the vent's edges. Not a big deal, I used Tite Seal as flashing which is a metalized flashing with a sticky butyl rubber backing. This provided a supple watertight seal. I add two diagonally crisscrossed 1/4"x1/4" galvanized wire mesh screens to the backside for bird, mouse, and bug control(see pics). Finally, I added an 8" long 6" galvanized round vent pipe with a female to female termination to the back of the vent. This pipe was screwed and silicon caulked to the vent side for a robust air/watertight seal. This pipe extension allowed me to easily connect the male end of the microwave hood vent pipe to the other side of my interior finished wall. Because I am using this for a over the stove microwave vent I found it difficult to locate an 8"x8" vinyl block so I added a J channel picture frame around the vent. Even with these modifications I'm extremely happy with the vent because it's built like a tank.

The unit is sturdy. What was a bother was that it came with a square rubber gasket that did not fit the unit, no matter how I stretched, heated, stretched again. I finally gave up on it and caulked. Also, it would be great if there was a pest screen in it so I didn't have to make one myself to guard against mice getting in; even if that's a remote possibility I'd prefer to be safe than sorry there.

Needed a good quality vent to keep the elements & nature from coming in and this product works great and it looks good & fast delivery was awesome.

The vent is well made and works perfectly. It was easy to replace the old vent with this one.

Excellent construction , great looking, easy installation,nice gasket with screws for weatherproof mounting!

I bought this to replace an old sun rotted plastic one. It works and fit great. Worth the cost and great quality.