- GUM 612 Cylindrical Refill offers 8 units for pens and fountain pens - Refills designed to provide smooth and consistent writing - Compatible with most office and stationery pens and fountain pens - Perfect for replenishing your writing supplies without interruptions - Practical format, easy to store on your desk or in your case - Ideal for students, professionals, and home use - Always keep quality refills on hand for your daily tasks