Bandai's "HyperCluster Bearing Set" released February 11, 2011.
This bearing set was among the first components released in the HyperCluster series. It contained a plastic bearing (PB), metal bearing (MB), plastic spacer set (S1), and a metal spacer set (S2). Ideally, you used the plastic components together with yo-yos intended for looping, and you used the metal components together with yo-yos intended for string tricks. This set was compatible with nearly all yo-yo sets in the HyperCluster series.
The HyperCluster series took the ease of yo-yo customization to a whole new level. The back of the package shows you other configurations you could build using compatible bodies, core parts, and bearings from other HyperCluster-series yo-yos.