Centering ring made of aluminum for cable routing including IPS seal as additional protection of the headset bearing against moisture and dirt. Compatible with the semi-integrated ZS56 headset upper part with integrated cable routing and the integrated IS52 headset upper part with integrated cable routing in combination with 1 1/8" steerer tube (28.6mm) of the fork above. The centering ring is identical to our fiber centering ring: 11.52.106R2-AM