We\’ve curated a selection of five of our best-selling blue/black fountain pen ink samples. Each 2ml sample comes in a labeled plastic vial. This set includes the following colors: Diamine 1864 Blue Black, Noodler\’s 54th Massachusetts, Noodler\’s Blue Black, Robert Oster Thunderstorm, and TWSBI Blue-Black. No substitutions. This bundle was last updated on August 13, 2025. Specific sample sets are not packaged separately from other samples ordered.