Are there any duplicates in the milk pack

There is no duplication of color between this 20 colors pack and the milk pack

Would these work in the more detailed adult coloring books?

Yes. They work very good specially for detailing!!!!!

This pens is originals?

Thank you for your inquiry. Although it is not an original color, this 20 color pack is a limited quantity item / mail order limited item.

It seems like some of the protective ball doesn't come off sometimes and makes writing scratchy. Any suggestions? When they're smooth, they're great.

I’v found that warming the pen up a bit by putting it under my desk lamp, or holding it in my hand for a bit has made the writing smoother, but I also think it may just have to do with the color of the ink because I remember buying the purple one 2 times from different places and they both don’t work as well as some of the others.

Brand	ゼブラ(ZEBRA)
Model Number	JJ15-20CA
Color	Set of 20 colors
Material Type	Resin
Point Type	Fine
Line Size	0.5
Ink Color	Blue Black, Green, Blue
Included Components	Storage Case
Product Dimensions	23.19 x 16.61 x 2.11 cm; 240 g
Shredded Shape	Waterproof

Zebra Gel Ballpoint Pen, Sarasa Clip, 0.5, 20 Colors, JJ15-20CA

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