This set comes with 10 gel pens in a range of bold colors, including black, green, and red. Each pen has a medium point that’s 0.7 millimeters in size. This pick is also available in three, four ...

Pilot G2 Retractable Rollerball Gel Pens, Ultra Fine Point, 0.38mm $15 $10 (33% off) Amazon ...

The Cerakote Bullet Pen features a sealed and pressurized ink cartridge that ensures it will reliably function at any angle, at temperatures ranging from -30° F to 250° F and even while underwater.