Replacement cartridge compatible with the 888 Infinite ballpoint pen. Line thickness: Medium (M). Color: Black. 6 pieces. Caran d'Ache. Absolute precision, highest quality, and continuous improvement are hallmarks of the Swiss traditional company Caran d’Ache. Founded in 1915, the manufacturer still produces its exquisite writing instruments in the Geneva workshops. Handcrafting and regular product inspections play a central role, which is the foundation of the excellent reputation of the Swiss Made label. Each cartridge is tested for lightfastness, and each roller tip and nib is checked for writing flow. To maintain the exceptionally high standard of its writing and painting tools, Caran d’Ache employs ancient techniques from around the world. For example, an ancient Chinese lacquer art is used, which is executed entirely by hand. Additionally, the manufactory strives to produce ecologically through various measures, such as avoiding solvents in lacquers, processing metals in a closed loop, and using FSC-certified wood.