How many kind of 5pin vital injector needles in the market?

Eungsung with two version vital injector.
Firstly all use same 5pin needle, 31g/pc packing in a sterilized bag, 20 bags/ box.
As the vital injector upgrade, engineer realize should make it more
stable so add a flip front. Because needle is design for compatitive
injector so it is 100% matching.
Now the first generation vital injector needle wthout with side
flip, vital injector 2 needle with side flap and front flap.
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