We are a startup that bought larger quantities of these fans for use with RPI's but then pivoted to a new product that doesn't need them.

Suitable for Raspberry Pi4 B / Raspberry Pi B+ / Raspberry Pi A+ / Raspberry Pi 2 and Pi 3 model B and B+.

The One-to-Two wire connector pins of this fan can get connected to either Raspberry Pi 3.3V or 5V pins to provide optional fan speed and air flow adjustment. 

This fan can be installed for most of the standard Raspberry Pi cases, but please don’t ask me if it works for your specific case, I don’t know.

Specifications:

Fan Size: 30x30x7 mm (LxWxH)
Wire Length: 2.6 inches (66mm)
Connector: One to Two pin
Color: Black
Voltage: DC 5V 0.2A

Packing Include
10 x Cooling Fans