The Jacques Herbin Essentials collection features a range of inks in gorgeously deep and vibrant colours, made using natural dyes. These are standard pattern ink cartridges, designed to fit most fountain pens and supplied as a pack of 7. QUALITY: Rich in bright, vibrant colour and incredible texture, these inks offer unparalleled writing quality, perfect for writing enthusiasts and lovers of beautiful letters! SIMPLICITY: The cartridges offer considerable writing autonomy, can be changed quickly and effortlessly, allowing you to rediscover the charm and pleasure of writing with a fountain pen! COMPOSITION: Water, humectant (limits drying of the nib), and a preservative (maintains ink quality over time). PRACTICALITY: Resealable box protects the cartridges and facilitates storage. (International cartridge size - 1.35ml). Compatible with all cartridge pens except for specific exceptions.