These bearings, as said by other shoppers, it doesn't click-fit in the bearing seat. But they spin much longer than the original Magicyoyo bearings. I found the outer wall of the bearing is thicker than normal yoyo kk bearings, so the beads are smaller than normal yoyo bearings, but they are also SIZE C bearings. That means it works for yoyos.
They are the same as the silver ones.