Ti Parts Ti-Nut chain tensioner nut

For Brompton Ti-Nuts Chain tensioner nut (Ti-6AL-4V) CNC produced
For Brompton張鏈器鈦合金螺母
The set consist of a chain tensioner nut (6AL4V) and a flat washer (6AL4V).
Weight: 11.9g/no. Original: 20.4g/no.