This is a pink resin Companion Cube keycap, from the game Portal and Portal 2. Perfect gift for a fan! 
 
Keycaps are printed using resin. It fits perfectly into any key(Doesn’t obstruct neighboring keys).
This only includes a single keycap.
 
Keycaps can fit into any cherry mx switch or clones. Customize and give a custom look to your mechanical keyboard with these awesome keycaps!