This fits your .
Pack of 5 Rotring erasers to fit current model 300 series and RapidPro mechanical pencils. Will also fit current model Tikky pencils and Tikky multi-function pens. Brand new, from Rotring in Germany. Rotring part number 1934364.
Rotring Refill Erasers for 300 Series Tikky and RapidPro Pencils 5 Pk - B01GDD2DA2