Hauptfarben: Talens Ecoline Brush Pen Set 11509803 ass. Bright 10 Stück (Multicolor)

There are 30 of them.

These are 30 pieces

Yes, if you iron too many times in one place. Also, it depends on the composition of the paper; not all papers absorb ink in the same way.

No, you can't. They are water-based. They wouldn't last a second on PET.

All the pens were in mine! All thirty pieces ;-)

This is the "Additional Colors" set with 30 brush pens. The colour numbers included are: 226, 259, 258, 231, 245, 390, 361, 350, 579, 381, 580, 551, 505, 640, 661, 654, 533, 666, 665, 676, 657, 374, 420, 439, 728, 738, 704, 706, 441, 440