B&B Friction Heat Erasable Pen 1mm White

These heat erase pens have a 1mm line and write with a smooth flowing gel ink, which is erased with the heat from an iron.  These pens are great for school and office work, and are also quite handy for art purposes; you can layout your art and use a hair drier to erase your lines after inking in the lines you want.  Marks disappear around 60*C and may re-appear around -5*C