FIT; Shimano 105 (R7000)
CAGE; Aluminum 6061 twin plates 2 mm thickness with light gray anodized.
PULLEY; 15T / 12T combination
Pulley material ; CH10(POM+CF10). A kind of plastic but stronger than original. Contains 10% carbon fiber.
Hybrid ceramic bearing installed. Full ceramic bearings are selectable +6,000JPY
PULLEY COLOR; Material color of CH10. It seems a black with marble.
CAUTION; *Derailer is not included.
*Chain link must be added as combination of gears.
*You should ask skilled mechanic to install it.