<https://vilros.com/products/uctronics-raspberry-pi-4-compatible-dual-fan-with-heatsink#Product>
<http://schema.org/description>
"Item Description\nThis is DC 5V Raspberry Pi 4 dual cooling fan with thermal tape and heatsink suitable for Raspberry Pi 4 Model B.\nFeatures\n\n\nSpecially suitable for the Raspberry Pi 4 Model B --- One dual cooling fan(50*25*13mm), one thermal tape(50*25*1mm) and two heatsinks(9*9*5mm), perfectly fit to the CPU and the other chips of the Raspberry Pi 4 Model B.\n\nHigh speed and low noise --- The DC 5V dual cooling fan run quietly at high speed, effectively get rid of the noise.\nEfficient heat dissipation --- The dual fan can be close to the heating chips for efficient heat dissipation with the thermal tape (It can stick the cooling fan with Raspberry Pi stably).\nAluminum alloy material --- High quality aluminum material improves efficient heat dissipation, tough and durable.\nEasy to install --- Remove the plastic film on the upper layer of the thermal tape and then stick the thermal tape to the bottom of the dual fan. Put the dual fan on the Raspberry Pi 4 Model B motherboard, then connect the red cable to the second pin, connect the black cable to the third pin. Stick the two heatsinks to the capacitance chip and the LAN chip.\n\nProduct description\nFeatures:\n\nUsed for Raspberry Pi 4B.\nDC 5V dual cooling fan, high speed with low noise.\nDual fan with the thermal tape and heatsink, high quality aluminum material, supreme cooling.\nIt can be assembled easily.\n\nInstallation Instructions:\n\nRemove the plastic film on the upper layer of the thermal tape.\nStick the thermal tape to the bottom of the dual fan.\nPut the dual fan on the Raspberry Pi 4 Model B motherboard.\nConnect the red cable to the second pin, connect the black cable to the third pin.\nStick the two heatsinks to the capacitance chip and the LAN chip.\n\nNOTICE: In case the dual fan can't be put on the motherboard perfectly, please leave the fifth step at final.\nPackage Including\n1 x Dual cooling Fan1 x Thermal Tape2 x Heatsinks1 x Screw driver\nNote: Raspberry Pi 4 Model B is NOT Included.\nProduct information\nColor: Dual Cooling FanPackage Dimensions    3.74 x 2.17 x 0.67 inchesItem Weight    1.41 ounces"
<https://vilros.com/collections/raspberry-pi-fans>