For use with Shimano Sora FC-3550 9spd Compact Double Chainsets - 50-34T / 46-34T
Can also use the 34T Inner Chainring from FC-3450 or FC-R345, these are a "B" match which indicates that the parts are usable, but differ in materials, appearance, finish & size etc.
Genuine Shimano replacement part.
Art. Nr. Y1NB34000