Many of our customers love this refill. The fine and medium point options, the additional blue/black color option, the price. The Monteverde rollerball refill for Montblanc fits most rollerball pens. One exception is the LeGrand. That refill is only available from Montblanc. If your rollerball takes this standard-sized, threaded refill, your pocketbook is going to love these from Monteverde.