Frixion 0.38mm ballpoint pen refills, red, blue, black - Colors: Red x 6, Blue x 6, Black x 8 - Thickness: 0.38mm - Brand: Frixion - Type: Ballpoint pen refills Thank you for viewing. Although the yellow cap has been removed from one, the blue cap on the pen tip has not been removed, and the ink itself has not been used.