12 pcs of rubber screws for mounting 3 cooling fans, black, soft and stretchable, ship from Los Angeles! A set of 12 extra soft rubber screws for open corner cooling fans with standard 3.5 - 4mm diameter mounting holes Greatly reduces vibration and noise causing by cooling fans - especially by high speed cooling fans Makes mounting and unmounting cooling fans much faster and easier Extra soft so they are much easier to work with - please be aware of cheaper imitations made with lower grade materials and much harder to work with. To ensure quality, please make sure to purchase from Tech Gears 4 Me, thank you very much!