Package Included 104 Normal ANSI Keycaps, no keyboard included This keycaps are high quality PBT double shot shine through. This keyset is best for led downside,if your led is upside of PCB,the led effects is not good. Compatiability It can be used for most standard ANSI 104/87/61 MX switches keyboard whose space is 6.25u,around 11.7cm. Incompatiability If the spacebar is 6u 6.5u instead of 6.25u,it can't be compatible.It's not compatible with Cosair Logitech.It's not compatible Some old Cherry keyboard whose Spacebar Capslock back hole is different,such as 1800After Service If some keys missing or broken on the way,just leave us message,we will send you missing or broken ones soon.Don't worry about it and don't leave feedback immediately.