The SST or SST II blood tube (serum separation tube) is specific for those samples that require serum. It has yellow colored cap.
It has a separating gel that allows for an easier separation of the serum from the globular package, as well as preventing the creation of fibrin. This type of tubes is used for clinical chemistry tests.
VACUTAINER SST TUBE BD 8.5ML RED
VACUTAINER SST TUBE GEL BD 5ML YELLOW