Did you know that minor vibrations emitted by fans can cause a significant, droning noise when transmitted to the case? Coolinks ultra-soft, highly durable Anti-Vibration Bolts effectively decouple the fans from the case and thereby help to reduce the systems overall noise emission. Features: Extra-soft silicone for optimal decoupling. Highly durable and tearproof rubber. Compatible with all fans and cases with standard mounting holes, easy installation and removal. Includes 12 Anti-Vibration Bolts for up to 3 fans.