The pens are filled with black permanent pigment ink that is acid free and does not fade over time

The markers in the picture are only an example

BOB59 aka 4Letters

which matters for straight-edge and template work where the tip drags against a ruler edge repeatedly

the stronger and longer the glow lasts

molotow masterpiece 360pi coversall 4 8 mm Alfe The pens are filled withThe pocket sized MASTERPIECE 360PI marker is equipped with the patented Flowmaster pump valve and filled with the pitch black COVERSALL ink. Which makes it your perfect tool for the big clean surfaces. The exchangeable 4 8mm Chisel Tip ensures a constant ink flow.