Tiso Sereo Front Derailleur New in Box - partially weight tuned to 55.7g. Has carbon outer plate and red aluminum bolts, original steel spring. Also includes second Tiso front derailleur used for parts (see photos, has original front plate & bolts, a TI spring, and pultruded carbon pins). These Tiso FD are very hard to find now. The lightest derailleur ever made. Great for weight weenie projects.