4PCS 30x30x7mm 3007 Transparent Brushless CPU 3.3V 5V Cooling Fan for Raspberry Pi 4 Model B, 3 B+, Pi 3, Pi 2, Pi 1 B+
https://www.vogueparade.com/shopping/EN/200185144/1/1005003473798594/4pcs-30x30x7mm-3007-transparent-brushless-cpu-33v-5v-cooling-fan-for-raspberry-pi-4-model-b-3-b-pi-3-pi-2-pi-1-b-//