O-Rings for Cherry MX mechanical keyboard switches (set of 125) - black - Keyboard Generic on LDLC
Amazon.com: ENHANCE Mechanical Keyboard O Ring Ultra-Quiet Switch Sound Dampeners Kit Soft 40A Clear (140pcs), Key Cap Remover, Cleaning Brush, Cloth and Accessory Bag - Mod Kit for Cherry MX, TTC, Kaihua :
Switch Keycap O-Ring Sound Dampeners White For Mechanical Keyboard Keys 104-Pieces,Key Cap Rubber O-Ring Switch Buffer | Diykeycap
Switch Keycap O-ring Sound Dampeners For Mechanical Keyboard Keys 120pcs/lot Key Cap Rubber O-ring Switch Buffer - Keyboards - AliExpress
Cherry Mx Rubber O-rings 120pcs Switch Dampeners Dark Black Clear Red Blue Cherry Mx Keyboard Dampers Keycap O Ring Replace Part - Keyboards - AliExpress
O Ring Dampeners for Mechanical Keyboards: Installation and Tests - YouTube