Wordsworth fountain pen ink cartridges. This is a set of 30 cartridges, 5 of each of 6 colors, but I used one red cartridge, so there are 29 in total. I am selling these because I bought the wrong cartridge size. They are new except for one missing red ink cartridge. Wordsworth & Black 30-pack Ink Refills for Fountain Pens Assorted Ink Cartridges International Standard Size, approximately 2.3 inches long Approximately 0.24 inches in diameter at the base Disposable, universal type - Quantity: 30 cartridges - Type: Fountain pen ink cartridges - Colors: Purple, Pink, Red, Blue, Green, Black Thank you for looking.