2Pcs Aluminum Heat Sink 5.9 x 2.91 x 0.39 Inch Black Heatsinks Fins for Cooler PCB Board LED Motherboard.with Thermal Conductive Adhesive Tape Cooling Fin

Five stars unless the adhesive fails at some point. I'm using them for passive cooling on my laptop power brick. For that purpose they fit perfectly. Did a light wipe with rubbing alcohol before sticking them on to assure clean adhesion. They are working, I can feel the warmth radiating when running a heavy power load with a game. The square shape of these also allows the power brick to be set on it's side so both heat sinks can passively radiate. Heat is the enemy of electronics! Keep it cool.

The thermal adhesive works great. The heat sync lowered the rep on my Avalon 3S well.

Bought it to cool my gpu back. Easy to use shaped two of them and I'm 4k gaming without worrying about anything. adhesive holds very well price was nice it fits nicely two of them on my gpu back (top) surface.

Accurate description. Quality, size and machining is top tier and even better in person! Great for heat dissipation, for various applications. I want more of these asap!

These aren't great. They're too large to fit inside any electronic device, and too thin to do much good when they're stuck to the outside - they need taller fins. Plus the adhesive isn't very strong - I pulled one off the outside of a metal enclosure using just my fingers, and yes, I had cleaned the area with alcohol first.

I have a gaming laptop with a 230watt adapter. The original overheated and had to be replaced. I had only gotten about 2 years out of it, so I decided I would try cooling on the new one. Just adding the passive cooling from these heatsinks dropped the temps by about 30 degrees.

Very nice, I added them to my 8 TB dirves to keep them cool, perfect height for the cover. I am hoping they will make the drives last longer.

Great for the price , does the job . Larger then expected.