Carbon Look Alloy Front Derailleur Braze-on Adapter Clamp 
 
These clamps are 100% compatible with Shimano, Sram, and Campagnolo and other front derailleurs. 
 
Faux Carbon appearance finish (not real carbon fider)
Designed to adapt Braze-on derailleur to Clamp-on frame.
Fits most brands of Braze-on Front Derailleurs
Material: Aluminum alloy
Titanium Bolt
Weights: grams
34.9mm: 24 g
31.8mm: 22 g
28.6mm: 21 g