This is a set of 19 Japanese ballpoint pens.
All inks are black
0.5mm
Contents:.
Uni Uni Ball One Gel Ink
Uni Jetstream 5 pens set permanent ballpoint pen
Zebra Sarasa Clip Gel Ball Ink Water-based Pigment Water-resistant
Zebra blen 5-pens set blen system to prevent writing vibration Emulsion ballpoint pen
Pentel EnerGel. Gel ink
Pilot Acroball 5-piece set. permanent ballpoint pen
Pilot Frixion Ball 3 Colors Ballpoint pen that disappears with the heat of friction
All of them are things that I have actually used and I am introducing the ones that I was happy with.