120mm AcoustiFan Soft Silicon Fan Gasket AFG120B

These really work, but might not fit your case. If you want to dampen two fans that are directly flush with each other, the extra width that the rubber adds will prevent the screw holes from lining up on the 2nd fan.Otherwise, if you're only dampening one fan, or there's enough space in-between two fans, these are awesome.

I like the screws bigger head and it longer than most other fan screws so I replace it also the reason I brought gasket because of the lip so I can place it between the cpu cooler and the fan to reduce the noise and vibrate

The primary noise from the machine I'd built for myself was from the one 120 mm fan that did not have a gasket around it at the time the machine was built. I finally got around to fitting it yesterday, and the gasket fit perfectly and easily, and was effective in suppressing the whine that fan caused.

I used this gasket to quiet a server rack fan. The thin sheet metal of the rack was vibrating due to the fan. This gasket did a great job stopping the vibrations. The rubber washers for the screws were a nice touch, but be careful not to over tighten the screws.

Definitely as advertized