Prym  - Chalk Pencil Eraser Refill 

 Refill eraser For the Prym Chalk Cartridge pencil.

Eraser refill for cartridge pencil, can be cut into pieces, sufficient for 3 eraser refills of 4 cm length each

The an eraser cartridge on the upper end of the pen reduces markings. When washed, the markings disappear.