My original ink cartridge has the numbers 1502. Is this the same?

Unfortunately, I don't know the answer to your question. I would contact the manufacturer.

0.7 = medium, but item description refers to it as "fine". is it really 0.7 (which makes it medium)? thank you.

Great observation. If you notice on the package the 0.7m is accurately noted as medium; however, the seller as described it as fine. So, the 0.7m in a gel is considered medium; but in a ballpoint is defined as fine.

Brand	ゼブラ(ZEBRA)
Model Number	88122
Color	bule
Number of Items	2
Point Type	medium
Ink Color	blue
Product Dimensions	7.29 x 19.69 x 9.53 cm; 371.95 g

Refill for JK Gel G-301 Rollerball, Blue, 2/Pack

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