Coolerguys 25mm (25x25x10) USB Fan

I bought this mini fan for my desktop terrarium, it was the perfect size. Super quiet. It was very easy to create a bracket for it.

Great Terrarium Fan

This is a great fan for a small terrarium. I need to design a mount so that I have better options for placement.

Coolerguys 25mm (25x25x10) USB Fan

Used these to cool my Raspberry pi. Perfect size and airflow and virtually silent. Good value.