Japanese made fibre and brush tips compatible with the Lumos Pens. Included in the box: - Fineliner: 0.1, 0.2, 0.3, 0.5, 0.8, 1.0 - Felt-Tip: Chisel, bullet & brush - Writing: 0.3, 0.5 Good to know: Nib sizes do vary by manufacturer (e.g., Sakura, Staedtler). Ours tend to be smaller, so advise to size down from customers usual preference. All nibs are compatible with most fountain pen inks, except highly experimental ones like shimmer and iridescent inks. Indian, acrylic, and gouache inks will clog your pen.