Tubes with spray-coated K 2 EDTA, the anticoagulant of choice in specimen collection and cell blood counting Requires eight to ten inversions for thorough mixing of blood and anticoagulant Plastic tubes offer a safer alternative to glass, are virtually break-resistant, and can be incinerated Tubes marked as Best Practice Formulary meet demanding requirements of complex diagnostic instruments and current clinical guidelines With conventional tube stopper Plastic Tubes Made of polyethylene terephthalate (PET) Provide a safer work environment for all personnel by (1) reducing risk of tube breakage during handling; (2) eliminating breakage when tubes are centrifuged at higher speeds; and (3) eliminating breakage or chipping of tube rims when stopper is removed and reinserted In addition to reducing potential injuries, fewer tube breakages result in less workflow interruption and fewer patient redraws, thus providing smoother day-to-day operation Documented reliability in hospital, commercial and research laboratories