Argon40 Fan HAT for Raspberry Pi 4, 3B, and 3B+ - DEV-17163 - SparkFun Electronics
Power over Internet(POE) Hat for Raspberry Pi 4/3B+
Sailor Hat for Raspberry Pi (SH-RPi) – Hat Labs
Cluster HAT Case for Raspberry Pi 4 - PiShop.us
Eight HV Digital Inp. 8-Layer Stackable HAT for Raspberry Pi
Raspberry Pi 4 Case for dAISy HAT – Wegmatt
Rpi HiFi DAC Hat – InnoMaker English|USB TO CAN Analyzer|Raspberry Pi Solutions|Industrial Camera
USB 3.2 Gen1 HUB HAT For Raspberry Pi, 4x USB 3.2 Gen1 Ports, Driver-Free
![[Discontinued] PoE HAT for Raspberry Pi 4, UCTRONICS Mini Power over Ethernet Expansion Board for Raspberry Pi 4 B 3 B+, with Cooling Fan](https://www.uctronics.com/media/catalog/product/cache/3fc89061b2edaf80fd04bd2337c00b73/u/6/u6110__1.jpg "[Discontinued] PoE HAT for Raspberry Pi 4, UCTRONICS Mini Power over Ethernet Expansion Board for Raspberry Pi 4 B 3 B+, with Cooling Fan")
[Discontinued] PoE HAT for Raspberry Pi 4, UCTRONICS Mini Power over Ethernet Expansion Board for Raspberry Pi 4 B 3 B+, with Cooling Fan
Raspberry Pi 4 Power Over Ethernet Hat (b) 802.3af Poe Network With Cooling Fan Temperature Oled For Raspberry Pi 3b+/4b - Demo Board Accessories - AliExpress
RAK9003 PoE Pi HAT – RAKwireless Store
Raspberry Pi 4B/3B+/3B X708 V2.0 UPS HAT & Power Management Board with – Geekworm
Cluster HAT Kit (includes 4 x Raspberry Pi Zero W)
Introducing Raspberry Pi HATs - Raspberry Pi
Adafruit Perma-Proto HAT for Pi Mini Kit - No EEPROM : ID 2310 : $4.95 : Adafruit Industries, Unique & fun DIY electronics and kits
RGB Cooling HAT with cooling fan RGB Light OLED for Raspberry Pi
IO Expansion Hat for Raspberry Pi 3/4/400 - DFRobot
This Raspberry Pi Smart Fan HAT is Stackable and GPIO Friendly | Tom's Hardware
Raspberry Pi 4 GPIO Expansion Board Breakout GPIO Screw Terminal Hat – MakerFocus
.jpg "STL file Raspberry Pi 4 Case for PoE hat・3D print object to download・Cults")