This is a pack of 2 eraser refills for the Tombow Mono One Zero eraser bodies.

Introducing the world's thinnest eraser! Tombow has created (according to their research) the thinnest and most agile eraser line on the market! The insightful designer created an eraser that logically fits its function. With pencil leads so thin, the correction tool should be an eraser that is shaped similarly to its nemesis. Two shapes are available, a 2.3 mm round shape and a 2.5 mm x 5 mm rectangular shape.