These Nexus ultra-soft silicone fan gaskets are designed to reduce the vibration from PC case fans and maintain a seal between the case side and the fan housing. Stop Vibration A case fan in contact with the PC housing can cause vibration during operation.This vibration can cause very annoying sounds. By placing a SA-Series noise absorber between the case and case fan you eliminate any direct contact between the two, this way there is less vibration and noise. Ultra Soft Silicone These silicone case fan noise absorbers are made from the best possible silicone to guarantee effectiveness and durability.The absorbers absorb the vibration that otherwise would be transmitted from the fan into the case chassis and case housing. The material is ultra effective and easy to install. Multiple Sizes These silicone case fan noise absorbers are available in the most common sizes. We have the SA-80 for the 80mm fans, the SA-92 for the 92mm fans and the SA-120 for the 120mm case fans. They are designed to fit the vast majority of fans and PC cases. Features: Soft and flexible silicone Excellent quality, long lasting life time Stops vibration very effectively Easy to install Available models: SA-80 - for 80mm fans (any fan thickness) SA-92 - for 92mm fans (any fan thickness) SA-120 - for 120mm fans (any fan thickness)