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 it will work with all cases we know of including the new Pibow Coupé 4 cases to fit it. It's just 5mm tall, so it should work with most of our HATs, pHATs, and other Pi add-ons.Features40x30x5mmCompatible with Raspberry Pi 4Fits Pibow Coupé 4 casesMatte black aluminiumAnodised non-conductive coatingComes with pre-applied thermal tape