Schneider Topball 850 Pack of 10 Assorted Rollerball Refills [bulk package] you are buying a pack of 10 Schneider Topball 850 refills in mixed colors you will get FOUR black, THREE blue, TWO red and ONE green Topball 850 RB refill medium ink line of 0.5 mm as described by Schneider universal rollerball refill; fits most capped rollerball pen bulk packaging