This sizeable (40x30x5mm) heatsink in Pirate black will let you eek out some extra thermal performance from power-hungry tasks. Perfect for the Raspberry Pi 4!
We sourced this chunky heatsink specifically for the Raspberry Pi 4 and designed our new Pibow Coupé 4 cases to fit it. It's just 5mm tall, so it should work with most of our HATs,