Awxlumv 40mm Heatsink Kit 40x40x11mm + Thermal Conductive Adhesive Tape, Aluminum Heat Sink Radiator Cooler for Cooling Nema 17 3D Printer Stepper Motor Driver TEC1-12706 Peltier Module Wi-Fi Routers

Generally good quality and good value for money, although the adhesive on one of the heatsinks failed and came unstuck repeatedly. The rest have been excellent.

Chromecast was overheating, smacked one of these on both sides, and problem went away immediately!

Everything seemed good until they randomly unstuck from my stepper motors. I had to return them. I ended up buying a 24 pack of heatsinks and thermal tape for the same price as these 4. You lay for convenience with these, but again they don't stick for long.

I needed a way to cool an excessively hot charger that I have. I tried this and Bam! The charger runs much cooler now. Amazingly simple.

These work great on my Ender 3 BUT I had to cut 4 rows of fins out to make my Y axis bed move correctly as it would get caught and stop. I think this is due to me using the metal bed screws instead of the stock black plastic ones. So if you have a stock Ender 3 with the stock bed screws then I think this would work with out any modifications.

They work fantastic, I used them on the back of my steamdeck with the jsaux backplate and they dissipate the heat well without getting so hot they burn your fingers. The tape is also very sticky so once you put them somewhere they ain’t coming back off.