RELAXED WRITING: Simply erase small errors - the ink can be removed completely and without smudging without leaving any residue. No more strike-through, tip-ex and messy worksheets – thanks to the thermosensitive ink, you can write everything relaxed from now on (yes, even birthday cards 😊). MAGIXX CARTRIDGES: The ink cartridges are compatible with our magiXX ink cartridge rollerball (not compatible with magiXX gel pens or fountain pens and roller balls outside the magiXX family). GREAT WRITING EXPERIENCE: Even ink flow and constant colour are the standard at ONLINE. The cartridges for erasable pens are ideal for learning to write and are practical for everyday use and office. At temperatures above +55 degrees (e.g. when erasing) the ink disappears, below -10 degrees it appears again. REPLACEABLE CARTRIDGE: Our magiXX ink cartridge rollerball is filled with the magiXX ink cartridge – a fluid writing experience that only water-based ink can offer you, combined with the practical eraser function! ONLINE BRAND QUALITY: We at Online are a German family business and producer of high-quality, innovative, functional and carefully designed stationery items since 1991.