The Kaweco Summer Purple 50ml fountain pen ink refill brings the freshness and elegance of a luminous violet hue to your manuscripts. Packaged in a wide-mouthed 50ml glass bottle, the water-based liquid ink ensures perfect nib lubrication for smooth and continuous writing. It is fully compatible with standard or pocket fountain pens with a converter. The unique summer purple color lends a poetic and personalized expression to diaries, handwritten invitations, artistic calligraphy, and special notes.