This year Pentel are celebrating 45 years since the launch of the world's first waterbased rollerball pen, their classic B-100 or R50 as it is known in Europe, manufactured by Pentel in 1972.
This special limited edition 8 pen set celebrates the pen's birthday in 3 special colours and a set of unusual ink shades as well.
Pentels other acheivements include the first permanent marker, the first felt tip pen and the first ink-rollerball.
Set includes 8 pens in a selection of colours
Featuring water-based ink, one pen can write for up to 2,200 metres
0.8mm cushioned ball nib gives approx a 0.4mm line width