FSA ENERGY COMPACT FRONT DERAILLEUR - Ideally suited for standard and compact cranksets. All stainless steel hardware. Polished and chrome plated steel cage. Up to 16 tooth capacity. Clamp-on style fits 34.9, 31.8 or 28.6mm seat tube diameter. Also available in Braze-on style. Weight = 89 grams (Bz-on)