Cool vintage 1990s Cristal Design arch booster in anodized purple aluminum! Arch boosters reduce frame flex at the seat stays, resulting in firmer brake feel and better performance! This authentic arch booster looks great and includes a set of vintage Shimano cantilever brakes and Dia-Compe pads with all the necessary hardware to mount the brakes and the booster on your cantilever compatible bike frame! Some corrosion on hardware, see photos.