The Kaweco Smoke Grey 50ml fountain pen ink refill offers a contemporary and subtle look with soft graphite tones in a 50ml glass bottle. Made in Germany with environmentally friendly standards and water-soluble, this liquid ink creates delicate shadows and elegant gradients that enhance sketchbooks and writing notebooks with flexible nibs. It is compatible with all standard and mini size converters from the brand. The minimalist modernity of smoke grey is the preferred choice for artists, urban sketchers and design lovers looking for a refined alternative to black.