The Argon40 Fan HAT for the Raspberry Pi Model B boards is a great way to cool your board during more intensive applications.
The Argon ONE M.2 case features an M.2 interface for using M.2 (Key-B or Key-B&M) SATA solid state drives (not included).
If you're looking for a fully-featured Raspberry Pi 4 case, then look no further than the Argon ONE Pi 4 Raspberry Pi Case.
The Argon POLY+ Raspberry Pi 4 Case uses a three piece snap-fit plastic design to protect your Pi 4 in a cost-effective way.