Compression ring made from aluminium for integrated cable routing (ICR) including a internal protection sealing (IPS) for additional protection of the headset bearings against moisture and dirt. Compatible with the semi-integrated acros zs56-headset-upper-part with ICR and the integrated is52-headset-upper-part with ICR in combination with a 1 1/8" steerer tube (28.6mm) at the top. This compression ring is identical to our fibre-compression ring: 11.52.106R2