Shimano XTR Di2 SM-FD905 Front Derailleur Adaptor

Shimano XTR SM-FD905 Di2 Front Derailleur Adaptor 34.9mm clamp band diameter with 28.6mm and 31.8mm adaptors Shimano XTR Di2 SM-FD905-L Front Derailleur Adaptor Low Clamp Front Derailleur Clamp: 34.9 (1-3/8") , 28.6 (1-1/8") , 31.8 (1-1/4") Weight: 42