Staedtler 218 non-permanent Omnichrom refill lead for Lumocolor Non-Permanent Omnichrom Marker. Water-soluble lead marks almost any surface but can be wiped off most smooth surfaces. 3mm diameter, 70mm long. Pack of 12 leads. For almost all surfaces, e.g.., Glass, leather, fabric, stone, metal, wood and plastic Colour intensive and light-resistant Does not dry out Odourless Mine diameter 3 mm Refill lead for Lumocolor non permanent omnichhrom pen (768N) Available in 4 colours Lead diameter approx 3mm