This Pilot V5 Hi-Tecpoint rollerball pen contains vibrant liquid ink with a unique ink flow control system for smooth writing. The pen features an extra fine 0.5mm nib, which writes a consistent 0.3mm line width. The barrel also features a viewing window for monitoring remaining ink levels. This pack contains 18 pens with black ink and 6 pens with blue ink (24 in total) in a retail display stand.