The pack of 10 Blue Keycaps from X-Keys instantly creates a custom layout for your application. You can use these colored keycaps to identify groups with related functions. These keycaps fit all X-keys (except the Stick series XK-4, XK-8, or XK-16). Designed for X-keys these keycaps are semi-transparent or translucent with a clear cover lens. This pack contains 10 keycap bases and 10 clear cover lenses.