The tube is dispensed with a special stabilizer. After collecting the blood sample, it can fix the blood cells to prevent the release of the genomic DNA of the cells, inhibit the degradation of the free DNA by the nuclease, and maintain the overall stability of the free DNA. It is used for the collection and storage of free DNA in venous blood samples for clinical examination.
| Materila | Spec（mm） | Volume（ml） | Color | Additive | Shelf Life(year) | Package |
| Glass | 13*100 | 5 | White | K2EDTA+ stabilizer | 1 | 50/1000 |
| Glass | 16*100 | 10 | White | K2EDTA+ stabilizer | 1 | 50/1000 |
