Details This link is only the shaft and switches for mechanical keyboard,no keyboard and switch tester included. Cherry switches Cherry MX Black/ Silent Black: Linear Switch,Actuation Force is 60cN.Silent black is more silent Cherry MX Red: Linear Switch,Actuation Force is 45cN Cherry MX Pink: A quieter edition of cherry red,called Cherry pink as usual Cherry MX Blue: Tactile and Clicky Switch,Actuation Force is 50cN Cherry MX Brown: Tactile and non-clicky switch,Actuation Force is 45cN,it's soft tactile Cherry MX Silver: Linear switches,40% faster than cherry red,little heavier than red,good for FPS player Pls note: This switches can be used with PCB smd led,such as GK61 GK64.No switch led hole on the top cover. 2 pin 4 pin switch plug led can't be used directly with this switches.