Uni UF-222-07 Erasable Rollerball Pen Ink Colour:Sky Blue rotring isograph College set comprises

rotring isograph College set comprises 3 isograph pens

Perfect for drawings on dry and wet materials of all types

with attached clearing pin

and the hip bone's connected to the backbone

Will work with some others

Uni UF-222-07 Erasable Rollerball Pen Ink Colour:Sky Blue rotring isograph College set comprisesThe Uni Ball UF 222 Erasable rollerball uses a specially formulated ink, an upgrade on its predecessor the TSI, which changes from coloured to clear when heat is applied. Simply by rubbing the ink line with the cap of the pen, enough heat is generated to turn the ink clear, 'erasing' the line cleanly. The same pen can then rewrite over the erased lines. Erased lines will reappear if subjected to very low ( 18 C) temperatures. When erasing, the ink