Introducing our set of 50 Fountain Pen Ink Cartridges in Black, Blue, and Red – the perfect companion for your writing needs. This set includes 50 high-quality refill ink cartridges with a 3.4 mm bore diameter, ensuring smooth and consistent ink flow. Whether you prefer classic black, professional blue, or vibrant red, these cartridges have you covered. Refill your fountain pen effortlessly and enjoy a seamless writing experience with this convenient and versatile set. Elevate your writing game with our Fountain Pen Ink Cartridges – the essential choice for discerning pen enthusiasts.