Lumocolor guarantees professional and effective presentation on all overhead transparencies. Not just an OHP pen! - can be used on most other glossy surfaces. Available in single colour packs of 10 or wallets of four assorted - red, blue, green and black or wallets of six assorted - red, blue, green, black, orange and brown. Type and Nib Sizes: 311 Lumocolor Non-permanent Superfine 0.4mm. 312 Lumocolor Non-permanent Broad 1.0-2.5mm. 311 Lumocolor Permanent Broad 1.0-2.5mm. Write on ANYTHING: film, DVD/CDs, vellum, and oh yeah, paper. The permanent, quick-dry ink and super fine tip make these the ideal planner pens Dry-safe ink and tip means even if the cap's been left off for days, it remains usable. one can just pick it up and carry on. Plus, no need to throw it away when the ink runs out. They're refillable, using our 487 refill jars Benefit from the best! These ink pens feature a durable 1mm medium felt tip for indelible permanent marking, and the lightfast ink won't fade, for long-lasting use and results