Sundia's bearing systems are second to none in precision and quality. The replacement bearings will fit Sundia Diabolos as shown:
Shining Series, Fly Series, Icy Series, Nimble Series, and Sun Series diabolos can exchange the Short axle, Long Axle Fixed or Bearing, Triple Bearing.
Sundia Monobolo Series can exchange the Monobolo fixed or bearing axle.
EVO Series can exchange the Evo Fixed or Bearing axle.