These Pilot V5 Set2Go Rollerball Pens have unique Hi-Tecpoint nibs which deliver a precise line of pure liquid ink. The pens give you a bright, dense colour and the ink flow controller system keeps the flow consistent until the very last drop. There is a handy window in the barrel of each pen so you can keep an eye on the ink level, ensuring you never get caught out with an empty pen. These pens are made of 100% recycled plastic and the 0.5mm tip gives a 0.3mm fine line. The plastic case doubles as a desktop pen holder to keep your pens organised. This pack of four pens includes one black, blue, red and green pen.