This is a used heatsink and PWM fan for Raspberry Pi 4 board. The fan is quieter than a lot of fans I’ve used.

Note that the fan connector is a single piece connector that is a tight fit that you will need to finesse into a 5v pin, an adjacent ground pin and an adjacent GPIO pin. Or you can run Fanless with the huge heatsink.

Also note that the heatsink will require thermal pads. I will give you a small sheet that you can cut to size to fit the heatsink on.

Finally the way the heatsink attaches to the board is with screws that screw in from the bottom. This will work great if you running a bare board otherwise you will need a case that allows you to screw it in from the bottom.