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 :
The Best O-Rings For Silencing Your Keyboard - Switch and Click
O-Rings Mechanical Keyboard Installation - Razer Blackwidow X (Do they make a difference!?) - YouTube