nice!Betatail what do you think of this one? It came with the reg.
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if you don't see the sticker that shows you the needle cartridge model(the number in the below picture), you can check the the second line on the tag, is max flow rate rating, let me know max flow rate number, so I can decide it is cartridge model.
if the number is less than 3B, as in picture, are good, best if it is SS1.