This is a gel ink refill in fluorescent colors for the Pilot Coleto Multi Pen in 0.4mm size. The Pilot Hi-Tec-C Coleto is a smooth writing pen with a needle tip for precise writing.
These colors write on white paper (they do not write on dark/black papers).
Fully customize your Coleto pen by selecting from different body colors/designs and selecting your refills which are available in a wide array of pen colors/sizes, pencils, and an eraser. Make sure to line up your refill correctly before installing.