A set of four 0.6MM Non-permanent dry erase marker for write-on films and other film surfaces such as sheet covers, laminated charts and whiteboards. With water-soluble, color-intensive, lightfast and low-odor ink which does not bleed through paper Airplane-safe: An automatic pressure equalization prevents the pen from leaking on board aircraft Cap with roll stop Wiper integrated in the pen's end plug PP barrel and cap guarantee long service life Eco-friendly: Easy to refill with Lumocolor refill. Made in German.