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What is the difference between the two marking pens?

The following two marking pens looks same, only the caps are different.

The  marking pen: A is mainly used as paint pen, which load the paint ink.
The marking pen: B is used as ear tag marking pen, which load the special ear tag marking ink.

The marking pen: A is not recommended to used as ear tag marking pen, because of the ink leakage when load the ear tag marking ink.

ear marking pen

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