High quality "Aluminum Heat Sink Kit" for Raspberry Pi 4 ensures better cooling of the SOC, RAM and USB controller. This will reduce the temperature of the Raspberry pi SOC by 10 to 15 degree celcius during normal operation. These heatsinks come with a pre-applied thermally conductive adhesive on the back.
1. Thermally conductive adhesive on the back, not some double sided tape found on cheap heatsinks.
2. Heatsink for the SOC has square shaped cut-offs ensuring more efficient surface area and better air flow.