Max Keyboard Keycap, Cherry MX Switch, O-Ring Sampler Tester Kit A must have kit to try Cherry MX mechanical key switch Mounted on PCB to simulate actual key feeling translucent clear keycaps (Qty: 4) Cherry MX switch types (Qty:4) [Cherry MX Red(1), MX Black(1), MX Blue(1), MX Brown(1)] Sound dampening 50A (0.4mm reduction) rubber o-ring (Qty: 4)