This is ideal after you have a lot of pens and refill ink - I suggest
getting 2 copies - one for the Markers and one for the inks.
I thought I had kept track of my colours and found that I was way out - so now I have brought my collection up to date.
Great for keeping track of which copic markers you have in stock and which you need to purchase.
Great to have ....makes keeping track of my markers SOOOO much easier !