DESCRIPTION -And here comes our new product – Markers with plug-in cartridges, make a mark on what you present in offices, schools, hospitals, etc. The marker is specially designed so that your words are emphasized not just on whiteboards, but on various other surfaces; when you need to erase it, it comes off easily. It’s refillable – change the cartridge. However, with a high cap-off time, the refilling parameter is as good as obsolete for the marker. Our inks have a long shelf life. Includes cartridge with 3ml ink. To start, pump 10 times and wait for the ink flow. Refillable Cartridge whiteboard marker in a pack of 4 pcs.