M&G's Si-Pen Rollerball Pen is a needle tip rollerball pen with 0.5 mm fine point with advanced ink feed system for smooth, skip-free writing and visible ink supply so you never run out unexpectedly. It is a non-toxic, quick drying roller pen with long writing. Free-flowing and fade proof liquid ink. Having blue, black, green and red colour options for body & writing ink. Now introducing Light Blue, Pink and Purple colours.