Fixed-angle centrifuges, although less expensive, produce gel layers that may be susceptible to rupture during transport. These damaged samples cannot be used without an additional centrifugation step; yet, the CLSI recommends against re-centrifugation due to its known negative effects on analytical results. For better gel layer formation, please consider Horizontal Centrifugation with one of the 642 Models. The 642 Models utilize patented horizontal rotor technology to reduce blood processing times by 33% while guaranteeing reproducibility, regardless of location.