Features: Reduce fan vibration Noise reduction Extend the life of computer accessories Easy to use, good elasticity, larger deflection, aging resistant, and effective vibration absorption Quick and easy to install Color: Black Material: Rubber Rubber screws for open corner cooling fans. Made from high-quality materials, these rubber screws are soft and provide excellent noise and vibration dampening. Compatible with mounting holes sized between 4.3 to 4.8mm in diameter. Designed for convenient installation and removal of cooling fans, ideal for reducing noise and vibration caused by cooling fans. Package Contents: 50 x Computer damping nails Note: The package includes only the items listed above. Other products are not included. Light reflection and differences in display screens may cause slight color variations between the image and the actual item. Measurement error allowed is +/- 1-3cm.