One milliliter syringe .01 cell is a unit.
Ordinary one-milliliter syringes are 0.2 ml for a large cell, and 0.02 ml for a small cell, while specialized one-milliliter syringes have 10 cells, that is, 0.1 ml for each large cell, and 0.01 ml for each small cell.
The thickness of a needle is expressed in terms of its size, which is usually 4.5, 5, 6, 7 and so on, and the 7 is the tip of the needle. The diameter of the needle is 0.7mm (may be the outer diameter) generally children use 4.5 or 5, adults use 7.
Use
Syringes can also be used for medical devices, containers, and scientific instruments such as those used in some chromatography to inject through a rubber septum. Injecting gas into a blood vessel will result in an air embolism. Air is removed from the syringe to avoid embolization by inverting the syringe, tapping it gently, and squeezing out a little liquid before injecting into the bloodstream.
In settings where precision is not the primary concern for germs, such as in quantitative chemical analysis, glass syringes are still used because of their small error margins and smooth pushrod movement.