Premium International Standard Size - 24 Black Ink Refill Fountain Pen Cartridges

NON-TOXIC. ZenZoi ink cartridges have a neutral PH, professional coverage and quality providing a smooth flow with each stroke. 

PRACTICAL SIZE. International/standard size of these cartridges make them generic and practical: they fit almost every cartridge/converter fountain pen on the market (including all ZenZoi fountain pens and most German fountain pens that work with international cartridge sizes). For Zenzoi Luxury Pens

VALUE PACK of 24 cartridges assures you'll not run out fast. Eliminates the need to keep reordering often.

CLASSIC VARIETY. Each pack includes this color:  24 Black cartridges. For variety set or Blue-Black mixed set please see our other products.

100% MONEY-BACK. No-questions-asked, no hassle guarantee. If for any reason our product is not what you wanted just messaged us for a full refund. With us you always shop stress-free. Because we're a family operated business, treating our customers like collaborators and family is simply our long term strategy to work and live. We put you first and we mean it.