Bic Gel-ocity Illusion Erasable Gel Rollerball Pen 0.7mm Tip 0.3mm Line Black (Pack 12) - 943441BIC Gelocity Illusion is a medium point, black ink, erasable gel pen which employs thermosensitive technology offering its user the ability to write, erase and re write. Its translucent barrel features a decorative wrap and a textured rubber grip for comfort. With a line width of 0. 3mm the BIC Gelocity Illusion is a versatile pen ready to use at home, on the move or in the office.