WASD 6-Key Cherry MX Switch Tester Provides an accurate representation of feel and noise of the Cherry MX switches Mounting bracket is made of the same steel as the backplate in our keyboards Translucent clear keycaps to easily distinguish between switch types and O-rings 6 Different Cherry MX Switches: Cherry MX Green, Cherry MX Clear, Cherry MX Red, Cherry MX Black, Cherry MX Brown, and Cherry MX Blue Also includes 6 of each type of sound dampening O-rings: Red 40A-L and Blue 40A-R)