The anti theft ring is a ring with a hole of 4 cm. You can put a chain- or cable lock through it so the pannier and bike can be attached to a fence a tree or something else.
If you would like a different colour please wright so in cmments.
The oudside measures of the Fr8 are:
lengte 49,5 cm x diepte 18 cm x hoogte 32 cm
4353 EB Serooskerke