The product is a used 4/4 violin by Andrew Schroetter, a Geigenbaumester model with the numbers 6/20, 6/9, and 4038. 

This violin is specifically designed for orchestral use and is of high quality, as indicated by the Andrew Schroetter brand. 

With a size of 4/4, this violin is suitable for advanced musicians looking for a professional instrument for their performances.

Case included.