This is a high-quality fan, ideally suitable for all kind of ventilation jobs in various applications. Come with a variety of connectors and bits of hardware. Maybe not Raspberry Pi case ventilation, however.

I bought this to replace the cheap fan that came with my Raspberry Pi case. Turns out it's not really suitable for this purpose. It didn't fit inside the case like the fan I was replacing, and required a 2-pin adaptor [included in the fan kit] that only added to the bulk of the installation. I mounted the fan on the _outside_ of my case and the connector cable runs outside the case and fits through a gap in the case. It's okay if you dig the cyberpunk aesthetic, but looks clunky and messy. OTOH it did bring the temp of my R Pi down from 72C to about 36C, so I can't complain about that.

If you want a compact fan that fits inside a Raspberry Pi case, this probably isn't it, unless the case is quite roomy. It can be made to work in a pinch, however.