KRINK Original Mop has a round 2

or display lettering — where the XT1 and XT2's finer ranges would feel too thin to carry visual weight on the page

Markal Quik Stik All Purpose is a permanent industrial marker that can write on all types of surfaces

acrylic marker

but of course you can use any kind of covering paint that can be used on stone and similar materials

on the run otr 4201 soultip painter empty marker 8 mm Alfe KRINK Original Mop has aEmpty pen from On The Run, that will work well with nearly any paint or ink. The pen is equipped with a round 8 mm fiber tip. Easily filled without making a mess via the screw cap at the top of the pen.