"Unicorn". Old French, "unicorne". Latin, "unicornis". Literally, one horned: "unus", one, and "cornu", a horn. A fabulous animal resembling a horse with one horn. Visible only to those who search and trust, and generally mistaken for a white mare. Unicorn.
This cap has a square stem and is designed to fit Cherry MX, Kalih, and Gateron switches. Check out the cap dimensions page for more details.