60 x Janrax 4 Coloured Ballpoint Pens - Colour Ball PensPack of 60 4 Colour Ballpoint Pens by Janrax. Change ink colour at the push of a button with this retractable 4 Colour Ball Point Pen. Choose between black, blue, red and green ink for a multitude of writing tasks. Ergonomic barrel with a rubber grip for comfort. 1. 0mm nibs writes a 0. 5mm line width. The ball point nibs provide a smooth writing experience and the retractable design prevents the ink drying out.