MSF-series

The MSF-series was a series of mouse droids produced by the droids of Uffel, based on the MSE-series made by Rebaxan Columni. A MSF-series droid could carry messages or perform simple repairs, working in cramped conditions. Unlike the MSE-series, the MSF-series had a tiny repulsorlift, so it could hover to many places a wheeled MSE could not get to. It was a very popular droid, especially in the Cularin system, and it was financially successful for the droids of Uffel.

Behind the scenes
Due to when it was developed (several decades before the Prequel Trilogy), the MSF-series was probably based upon the unrevealed MSE-2 or MSE-3 mouse droid.