Tombow Mono Sand & Rubber Eraser
A calligraphy kit must have. This little eraser is something that I cannot live without.
Two functions in one eraser - the white side is your normal eraser for pencil and the grey side has silica grit particles in it which removes coloured pencil and ink marks, including ballpoint, rollerball and some marker. I find it particularly useful for ink smudges and flicks.
Environmentally friendly, produced with all natural materials, with 100% recycled pulp sleeve.