30 PCS Raspberry Pi 4 Heatsink Kit with Thermal Conductive Adhesive Tape, Aluminum Heat Sink Cooler and Copper Heatsink for Raspberry Pi B B+ 2/3/4/5

They are bits of metal to be heatsinks. What else is there to say? Are they pretty? I guess so. Are they heat sinky? Sure.

They install easily and work great!!

Multiple sizes to choose from, easy to apply. Good price for what you get.

Purchased these for a project but realized that although these may work for the Raspberry Pi, they are not big enough for the chips I want to cool. I really wish the listing indicated the size in inches so that I would not have to convert from metric.

Plenty of heatsinks, more than I needed and more for the price than competitors. Easy to install with the preapplied thermal tape.

I've used several types of heat sinks on the Raspberry Pi (3B, 3B+, Zero 2 W) and this unassuming bare aluminum set provides surprisingly good cooling. Even better than some of the more sophisticated looking annodized model. In fact, this set (the 14x14mm CPU cooler) provides a 3 degrees C improvement in idle temperature over other models I've tried. (Zero 2 W overclocked with over_voltage=4, arm_freq=1300, core_freq=500). The Pi with this heat sink idles at 37.6'C while the annodized competitor idles at 40.8'C.The thermal tape is good and provides good adhesion (just remember to firmly seat the heat sink on top of a clean chop and reseat once or twice over the next day or so)

I have 3 XBox 360s and this was a sufficient number of heatsinks to cover virtually every exposed chip (and a large transistor) and not have too much left over. Some of the smaller ones I used to double up. I did have to bend the heat pipe on the first model I've used this on, in order to get it around the heat sinks on the memory chips, but that was expected based on other reviews I've read. As pre-made kits are not commonly found for the 360 anymore, this plus some thermal pads I bought separately seems to be all I need to prevent heat death affecting these older consoles, preserving them as an important piece of gaming history.

They work as expected but mine was missing 4 of the 6 copper 1mm pads (there were only 2 in my package), the rest of the parts were included. Fortunately I don't have much use for the 1mm pads anyway (I bought them for the other finned heat sinks). Still, I expect to get what was advertised.Since these are tiny, they won't do a whole lot without air movement. This is not the fault of the heat sink but if you are expecting significant differences in temps you will also want something to move a bit of air as well.The lower star rating was due to quality control in actually shipping what was sold as well as the low quality adhesive. The heat sinks stick but don't pull on them too hard or they may come off.