4 Inch Air Carbon Filrer Smelliness Control with Premium Australia Virgin Charcoal for Inline Duct Fan, Grow Tent Odor Control, Hydroponics, Pre-Filter Included, Reversible Flange

Works very well and looks great! Very sleek and quality. (Didn't use it for a traditional setup. I made it work for my homemade setup.) Easy installation, Has a strap style bracket so you can strap it up wherever. Has 2 hanging points. It's versatile and I can change it later if needed. I love the cleanable re-usable filter sock that comes with it. Really helps to filter out the dust, you can smell the fresh air in the room vs out of it. The size is perfect for me, would work in a tent setup if you wanted.

Very good quality, not to big and bulky. Works well.

I use this in my 4x4 grow tent, and it completely eliminated all odors in the entire room within 15 minutes. Excellent product.

Slips right over any 6" exhaust fan, straps to the top of your tent and IMMEDIATELY removes the smell from the exhaust. Spider Farmer is a very trusted brand for indoor growers and this filter is just as high quality as everything else I've ever purchased from them.

Great product

it seems to work but for the same price you can get the AC version which is about 6 inches longer and packs more carbon. I would propose that being longer that it’s more effective. 25% more effective, or longer lasting. It’s good in a compact area.

Says what it is right on the package. I don't mind but I'm sure some people out there would want to know that if they live in an apartment or something. Package dented in and carbon filter bent in. Not just the outside but I can see the dent on the inside of it too.

The one thing I would like to know is if the carbon filter is replaceable ? if not why not I really do not want to buy a complete unit each time rather than changing the filter.