SpecificationColorDiameter of needle Average Blood Volume33G 0.23mmLow32G 0.26mmLow31G 0.25mmLow30G 0.32mmLow28G 0.36mmMedium26G 0.45mmMedium23G 0.60mmHigh21G 0.80mmHighSurgical blood lancet blue colour twist top 1) Disposable sterilized stainless steel blood lancets:A) Material: Stainless steelB) ......
| Specification | Color | Diameter of needle | Average Blood Volume |
| 33G | 0.23mm | Low | |
| 32G | 0.26mm | Low | |
| 31G | 0.25mm | Low | |
| 30G | 0.32mm | Low | |
| 28G | 0.36mm | Medium | |
| 26G | 0.45mm | Medium | |
| 23G | 0.60mm | High | |
| 21G | 0.80mm | High |