12 Pcs 120mm PVC Black PC Cooler Fan Dust Filter Dustproof Case Cover Computer Mesh

Perfect fit, good air flow.

Very tiny holes. I purchased this to provide fresh air to a grow chamber, but not allow humidification to escape. Seems to keep the moisture in the chamber. The product seems to come with a very smooth side, that's the side I place in the chamber. Works well.

Easy install they are plastic so you can cut them with scissors if you need to maybe as a retrofit or custom fit holes are pre-punched and since they're plastic easy wipe down they're flexible don't have to worry about paint chipping or anything like that

Used this to make lenses for a Spider-Man cosplay and I have to say It works very well for what I need it for. Just don't paint it with too heavy of a coat and the paint won't clog the holes.

Love the screw hole knockouts, these fit the 140mm fan configuration perfectly. They're sturdy and provide good airflow but stop fine dust particles. They're PVC plastic so they're washable, but for the price, it doesn't hurt to throw away and replace.Seller shipped immediately, the product arrived sooner than expected, in perfect condition.Highly recommended!

What is not to love about these? In spite of being very thin, these things are really effective at catching dust. Be aware that they do present a very slight airflow restriction, but anything you put in front of a fan will do that. Just make sure to keep these filters clean! Just take the filter out and use compressed air to blow the dust out and replace. You could also use warm water to flush out the dust. I do not recommend using any kind of soap, just plain water will work fine...just remember to let them dry before reinstalling them.They get the job done and are worth the investment.

I purchased the ThreeBulls 12 Pcs 120mm PVC Black PC Cooler Fan Dust Filters. Decent dust filters. They are better than nothing. These are perforated plastic. Essentially you have a nice smooth side and the other side is slightly rougher (from being perforated I guess). You still get decent air flow but its certainly not the best. I had no issues with temperature but there are other factors at work there in custom rigs. I simply wanted a quick dust filter and these fit the bill. If the dust on them gets too bad or doesn't clean off right then you can just throw them out and grab another.These have pre-perforated holes for the screws. I found that these are lined up pretty good for simple installations but I had a couple times where I needed to match the holes for custom installation. These filters are on the brittle side so care is needed for cutting and drilling if need be. In the end I used a Dremel to modify the screens as I needed for special situations.I don't mind working through these 12 filters to build PC's for someone else.. because the filters do work and are better than nothing... but I think I would spend a little more on my own rig's filters because these are not really what I had hoped for when I purchased them originally.

I like'em! They seem quality. They aren't flimsy And I'm happy to have all of the extras unlike that other guy.As you see in my pictures I have smaller fans. Two 60mm. Two 92mm on my cpu Heatsink. A 92mm stock exhaust.You can easily cut these with standard home scissors ✂ which I had to do. I slid them behind my intake fans and my Heatsink. My temps are all the same still. No change.Only time will tell how much they really help. And how often you have to clean them.Will update in the future.