BBB ChainWatch Chain Drop Protector Features: 6061 T6 aluminum chain drop protector. Almost invisible installed on the front derailleur. Compatible with chain rings within the range of 53-39T or 46-39T. Including bolts and washers to fit various front derailleurs. Weight: 5g (BCR-80R) or 4g (BCR-80C).
Best Price: £13.00 from Merlin Cycles