Make sure this fits by entering your model number. Monteverde refills are not manufactured, licensed, or endorsed by the pen manufacturers referred to. The trademarks of the pen manufacturer are identified only for the purpose of providing refill compatibility information. Monteverde Ink Bottle, Blue (G308BU) Monteverde (Est. 1999) and based in California USA, has always been the fine pen industry leader in introducing new shapes and unimagined colours. This expereince has created unprecedented designs and technologically advanced innovations in pens, refills and inks. This strong commitment to new quality products has enabled the Monteverde brand to be sold world wide.