A suitable replacement refill is Schneider Express 75 M (ISO 12757-2-A2) which will need to be cut-down to 93mm length. We sometimes take for granted just how often we need and use pens in our daily lives and the moment you desperately need one, there never seems to be one to hand. Our exciting WHSmith range encompasses thousands of styles and pen types so you need never be without one again. If you’re a dedicated handwriting aficionado, browse our selection of stylish fountain pens from Parker fountain pens to LAMY, Cross and Caran d'Ache for the ultimate writing experience. For those destined to scribble on every paper surface available, our selection of ballpoint pens, rollerball pens and gel pens are easy to use and beautifully designed. For children just entering the world of writing, the right school pen can make all the difference. Our selection includes pen choices used nationally by schools with easy grip and smooth nibs - perfect for small hands and developing writing. Just for the record, I've just changed the Refill in my Kaweco 619 Ballpen (which often comes in sets with Kaweco v12 and v16 Piston-Fillers) They're the 50's and 60's forerunner (but smaller) of the modern Kaweco Sport.