Oh I should add that initially when I asked the teacher, I asked about the 3 valve Jupiter so she said if she's going to continue in high school, get the 4 valve, if not, the Jupiter 3 valve is fine and then she said she wants her to move to 12C so she probably meant to the 12C for the 3 valve option. My daughter uses 5G with her home instrument. Don't know what she uses at school. The Wessex says it comes with a mouth piece, not sure what..