Features: 2.6mm fountain pen inks cartridges (80 pack) offer seamless compatibility with most standard pens, ensuring hassles frees replacements and uninterrupted writing for daily use. Crafted from friendly materials and safe inks, these disposables cartridges prioritize user safety while delivering consistent, leak proof performances across all applications. Ideal for students, teachers, busy professional, and artists seeking safe inks solution for note taking, grading, document signing, or creative sketching. Perfectly suited for classrooms, offices, art studio, or travel, these cartridges eliminate messy refills and maintain workflow efficiency in highly demand environments. Each cartridge features a quickly clicks installation systems and fade resistant inks formulas, providing smooth, skip frees strokes for precise handwriting and detailed artwork. Specifications: Materials: Plastic+Inks Color Optional: 2 Color are Available as Shown in the Picture. Package Weight: approx.200g Size: approx.5cm/1.96in Package Includes: 1 Box of 80Pcs Fountain Pen Inks Cartridges note: Please allow 1-2cm error due to manual measurement. Please make sure you do not mind before you bid. Due to the difference between different monitors, the picture may not reflect the actual color of the item. Thanks!