GMK CYL Prussian Blue is a custom keycap set designed for mechanical keyboards, featuring a Cherry profile and compatibility with MX switches. Made from ABS plastic, the keycaps include doubleshot legends and UV front-printing where necessary. The set showcases a simple color scheme with a GMK stock white for the legends paired with a unique RAL 230 20 20 (Preußischblau) base color. This keycap set pays homage to the historical intersection of Poland and Germany, particularly the former Kingdom of Prussia, while also celebrating personal heritage. The product is set for relaunch with a list of vendors across various regions, ensuring broad availability.