Amazon.com : 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
Schmidt 5888 Rollerball Pen Refill, Black Medium – Pitchman®
Schmidt Safety Ceramic Roller 888 - Black Ink Medium Tip (.7mm)
Amazon.com : Blue Schmidt German Roller Pen Refill Safety Ceramic Roller 888 F (2 Pieces) : Office Products
Retro 1951 Short Capless Rollerball Ink Refill Fine Tip, Schmidt P8126, P8126 Short Black, 2-Pack Schmidt Capless Roller Ball refills, fits Retro 51 Tornado Roller Ball Pens.