water color pen with magnet, Different colors are available. non-toxic ... any soomth surface CAN BE OEM water color pen with magnet,Magnetic pen,COLOR PEN: Our products are ... different from common ones :1. Refilled with ink cartridge, and the nib can be replaced.2. ... It cleans off easily with dry eraser4. For all smooth board surfaces, such as whiteboard, window, glasses, table, paper. 5 ...