Theses are flutes designed to be a first flutes for most students and will carry most student flutists through their first 2-3 years. The Intermediate flute has many categories. The majority of players will usually never need to go higher then the Intermediate level.
Professional flutes are usually handmade but at the least, hand finished by a specific technician.
The Low end of Professional flutes are Solid Silver bodies with Hand Mounted, French silver-plated keys. They start with at least a Solid Silver headjoint and either Plated or Wood body and go up to the high end Intermediates that are Wood throughout. Basically handmade piccolos. They are typically wood with Solid Silver keys. The lower end of this category will have plated keys but still at least a hand-finished body.