This replacement cartridge is specifically engineered to fit perfectly within the dual-function brass writing instrument, allowing you to instantly revive your favourite ballpoint without replacing the beautiful, patina-developing barrel.

This refill usesblack water-based dye gel ink, providing a vibrant, consistent, and effortless writing line with minimal drag. Ideal for planners, journals, and everyday correspondence, this high-quality gel ink dries quickly and maintains the superior writing feel expected from Japanese stationery. Stock up on these official refills to guarantee longevity and flawless function for your cherished Brasspen.

• Nib Size: 0.5 mm
• 1 refill per package
• Black ink colour
• Made in Japan

About KOKUYO

KOKUYO began in 1905, when their founder opened a shop selling ledger covers.
Since then, their organization has expanded through the development of innovative products and services, and by keeping abreast of the changing times.