Private Reserve Ink mini 635 D1 ballpoint refill. Made in Germany by Schmidt and packaged in the US under the Private Reserve Ink name. Fits all pens using the international size D1 (mini) refill. Approximately 2-5/8" long. Partial list of pens that use this refill:Cross Multi-Function Pens, Franklin Covey Hinsdale, Kaweco Sport and Liliput, Lamy Multi-Pens, Monteverde Tool Pen, Parker Executive Quattro, Retro 51 Tornado Elite & Touch, Rotring Multi-Pens (Duo, Trio, Quattro), Worther Shorty Ballpoint, and any other pen taking the international-size D1 mini ballpoint refill.
Private Reserve Ink 635 D1 Mini Ballpoint Refill made by Schmidt - Blue, Medium, 1 Pack EFA8gSZz