Features: Brand new and high quality Achieve a quieter and more efficient cooling experience with these PC fan mounting screws. Perfect for reducing vibration and noise in your computer system. Easy installation with no need for tool. These screws fit most fan size and PC case. These screws is great for computer enthusiasts and builder. Enhances your system performances. Upgraded your computer system with these convenient mounting screws. Suitable for various environment where noise reductions is important. Control of your computer noise with these quality mounting screws. Suitable for performances and compatibility. Specifications: Material:Silicone Type:12Pcs/24Pcs/36Pcs Package Includes: 3 Optional Package: Package 1 Include:12Pcs Mount Screws Package 2 Include:24Pcs Mount Screws Package 3 Include:36Pcs Mount Screws note: 1.Please allow 1-2cm errors due to manual measurement, make sure that you not mind before order. 2.Due to the differences between different monitors, the picture may not reflect the actual of the item.