rOtring Refill Erasers for Tikky, RapidPro Pencils, 3-Pieces (S0271220)
How to extend life on a Rotring 800+ eraser? : r/mechanicalpencils
Rotring Tikky Mechanical Pencils Set With Pencil Refills And Eraser 0.5mm Precision Lead For Drawing Sketching White Black - Mechanical Pencils - AliExpress