Dear Pattanant,
the refills are included in the PEN box, the length of 1 refill is 80 mm, weight 5,6 gramme.
The size of the packaging of the refill is 86 x 20 x 13 mm, 24 gramme weight. 6 coloured refills are in. 5.6 mm caliber.
You can also buy the refill separately, sale sprice is 10,00 USD.
Bei Rückfragen stehe ich Ihnen gerne zur Verfügung.
If you have any questions, please feel free to contact us.