Functional specification:
No additive tubes are used to obtain a serum sample. The sample is used for biochemistry and immunology test. The tubes are available in plastic, a range of sizes and can be identified by a red cap.
Technical specification:
| Material | Spec（mm） | Volume（ml） | Label | Package |
| PET | 13*75 | 2 | Paper label/UV Printing | 100/1800 |
| PET | 13*100 | 5 | Paper label/UV Printing | 100/1800 |
| PET | 16*100 | 10 | Paper label/UV Printing | 100/1200 |
