Shimano Tiagra 4503 Triple 9 Speed Front Derailleur

This is a sport-level, road, 9-speed compatible, front derailleur, that is compatible with cycles equipped with Mega9 drivetrains.
It has a plated steel chain cage, with Aluminium links and band, and a multi clamp band to fit 28.6 and 31.8 frame tubes.
It also has an extra wide pivot link that increases rigidity, while reducing flex, for improved shifting response.
It has a maximum capacity of 20 teeth, for 50 tooth outer rings.