New product following bike shop closure.

This kit is intended for ZIPP brand wheel hubs.
The label is very precise: it is a replacement kit for several generations of hubs used on the brand's famous carbon wheels (such as the Zipp 303, 404, 808, etc.).
Here are the compatible models listed on the bag:
1. Hubs for rim brakes
76 (Front hub)
176 (Rear hub)
2. Hubs for disc brakes
77D (Front hub)
177D (Rear hub)
3. Recent hubs
ZR1: This is the more recent hub model found on current Zipp Firecrest ranges.
Technical specifications:
Content: The bag contains 2 sealed bearings.
Usage: These bearings ...