Product Description: 1. Product name: Fountain pen ink 2. Product size: A,BandC: 75ml D: 70ml 3. Product style: pen ink 4. Product color: red, blue-black, blue, black Product features: 1. Vivid colors: This ink comes in four classic colors - black, blue, red, and blue black. Each color is rich and vibrant. 2. Smooth and consistent: High quality ink enables easy and accurate writing. 3. Widely applicable: Whether you are taking notes, signing documents, or creating artworks, these bottled inks are suitable for a wide range of applications. Compatible with most pens, they provide a smooth and enjoyable writing experience. Attention: 1.As we all know, different computers display different colors, and the real color may be slightly different from the following picture. 2.Due to manual measurement, the size may have an error of several centimeters Shipment includes: 1 bottle of pen ink