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 :
O-Rings Mechanical Keyboard Installation - Razer Blackwidow X (Do they make a difference!?) - YouTube
Cherry Mx Rubber O-rings 120pcs Switch Dampeners Dark Black Clear Red Blue Cherry Mx Keyboard Dampers Keycap O Ring Replace Part - Keyboards - AliExpress
Mechanical Keyboard O-Ring Mod - Quieter and Gentler - YouTube
KEYBOARD O RINGS.... SHOULD YOU USE THEM? - YouTube