How to distinguish the size of the needle of the dispensing machine

The size of the needle of the dispensing machine is mainly defined as the size of the inner diameter and outer diameter of the needle, and the size of the needle is identified by the combination of numbers and letters G. At the same time, in order to make it easier to distinguish the size of needles, different types of needles are produced with different color bases. This is a national standard with unified specifications. The same type of needle, there are different lengths, the conventional one is 1 inch, also added length.

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