This blue ink refill is specially designed for use with Swarovskis range of elegant rollerball pens. Whilst the high-quality cartridge is finished with a metal tip made by industry leader Mitsubishi Pencil Company, the oil-based ink is waterproof, non-fade, and tamper-proof. Perfect for up to 700 meters of smooth, smudge-free writing. The refill is compatible with all of our rollerball models.