Amazon.com: Griarrac Cherry MX Switch Tester Mechanical Keyboards 9-Key Switch Testing Tool, with Keycap Puller and O Rings : Electronics
Cherry Mx Rubber O-rings 120pcs Switch Dampeners Dark Black Clear Red Blue Cherry Mx Keyboard Dampers Keycap O Ring Replace Part - Keyboards - AliExpress
Rubber Ring Keyboard Switch | Rubber Ring Switch Cherry | Keyboard Damper Replacement - Gaskets - Aliexpress
Cherry MX Red vs Brown Switches, Red vs Blue O-Rings Review | Taugrim's MMO Blog