High Quality Reproduction (UK Made) Bultaco Sherpa/Alpina style Snailcam adjusters (PAIR) CNC Machined in Aluminium Alloy to the exact proportions of the original oem items.Bored for a 12mm Axle. (Ossa etc) Based on Bultaco Part # 122.05-016 Except ours are handed and have engraving one side only. Please also see our 15mm and 17mm Hole variants of this part. Can also be used as a generic snailcam adjuster for pre65 etc.