All Waterman rollerball pens feature a separate cap and body design. Your Waterman rollerball pen will fit a Waterman rollerball, fiber tip or special Waterman standard ballpoint refill, enabling your Waterman rollerball pen to instantly become a ballpoint. We also offer Monteverde rollerball refills, spring-loaded fineliners, standard fineliners, liquid ink and GEL ink refills. Certain Schmidt and Pelikan rollerball refills fit too. Some refills come in as many as ten color choices and fine or medium points.