Kit contains 12 Full Complement bearings for Giant Reign 2015-17 suspension pivots.
2008-2014 Reign uses Giant Suspension Bearing Kit #12 which doesn't have the rocker to shock eyelet bearings.
2018+ Reign uses Giant Suspension Bearing Kit #21 and has a trunnion shock (bolts directly into the shock head).

Full Complement (FC) bearings are designed for use in the short rotations & high loads of suspension pivots.  Where a normal caged bearing contains bearings with space between them and a cage to hold them apart, FC bearings are packed completely full of balls.  This gives greater contact area and makes these bearings last longer than standard caged bearings in suspension pivots.