The Pack of 12 Pentel R50 Rollerball pen is a rollerball pen with a fine nib and water based ink.Featuring a cushioned ball tip for smooth writing using minimal pressure, this Pentel R50 ballpen enables fluid, skid-free writing. It is fitted with a 0.8mm nib, which produces a fine 0.4mm line. With its distinctive green barrel, most people will know the Pentel R50 as the original rollerball from the 1970s. Therefore this is a tried and tested ballpen with plenty of history. The Pentel R50 is exceptionally long lasting, and can write for up to 2,200 metres, making this pen perfect for everyday use at school, home or the office. It\'s kinder to the environment too, with 76% recycled content (excluding ink).. Pack of 12