SCH8126P  Schmidt® P8126 Short Capless Rollerball Refill, Blue, Fine. Fits most roller balls using short style capless refills including Bexley, Cartier, Delta, Marlen, Monteverde, OMAS, Pelikan, Retro 51, Visconti and others. Measures 97mm (3.8 inches), 6mm dia (0.26 inches)