The Parker 5TH blue ballpoint pen refill F 1950275 was designed exclusively to power the innovative Parker 5TH writing system. Featuring a fine tip (F) with an engraved metal sleeve and blue ink, this refill combines the fluidity of a fountain pen with the convenience of a ballpoint pen, adapting to the user's writing style. The blue tone provides clean, flawless lines. It is ideal for those who own a Parker 5TH pen and seek fast and impeccable writing.