and the color-coded end caps make it easy to grab the right grade out of a full tool roll without checking each one individually

That range is part of why it's the most commonly reached-for tip in bullet journaling and hand-lettering specifically

visible ink window

so the line stays consistent for the life of the marker rather than fading

pilot v board master small refill Risk and the color-coded end capsThis is the replacement ink cell for the Pilot V Board Master S whiteboard marker. It twists into the marker barrel in place of an empty cartridge, so the same marker body can keep being used instead of being thrown away and replaced. The capsule is clear, so you can check how much ink is left before it runs out mid task. Specifications Type: liquid ink dry erase refill cell Compatibility: Pilot V Board Master S marker only Available colors: Black,