Schmidt Standard Ceramic Rollerball 888 (F, M, B) Refill - The Pen Refill Guide
Amazon.com: 12 Pack - Schmidt 888 (888B) Ceramic Tip Rollerball Refills - Black Broad Point
Lanier Comb Pack - Pack of 12 - Schmidt 888 F Safety Ceramic Rollerball Refills 6 Black Fine and 6 Blue Fine ink Fine Tip : Office Products - Amazon.com
Schmidt - 888F Rollerball Refill (Black) – KOHEZI
Schmidt 888 Safety Ceramic Rollerball Refill, Black, Broad 1.0 mm