The gray, pack of 10 XK-A-502-R Tall Keycaps from X-Keys instantly create a custom layout for your applications. You can use these tall keycaps for frequently used triggers or modifiers. Tall keycaps replace two single keys on an X-keys device. Each package contains ten key cap bases and ten clear cover lenses. These keycaps fit on all X-Keys keys except the Stick series (XK-4, XK-8, or XK-16).