Lumocolor Superfine Fiber-Tip Nonpermanent Ink Pens write on virtually all smooth surfaces including overhead film, paper, glass and plastic. Ink resists fading and won't burn out. Water-soluble ink can be wiped off nonporous surfaces using a damp cloth. Great for crafts, graphic arts, photography, lab work or print shop. Each fiber-tip pen features a polypropylene barrel and cap with clip so you can attach it to pockets, notebooks and more.