This is a remix of the anti vibration foot of Dred1969 on Thingiverse. It was originally designed for 3d printers to reduce noise and ringing artifacts.
I'm using this foot for my NAS which is sitting on a cabinet. Similar to a guitar resonance body, the cabinet made the NAS even louder. With this foot, I keep noise at bay.
My QNAP NAS has feet with a diameter of 30 mm. I have scaled the top opening of the anti vibration foot to 31 mm so it accomodates my NAS foot and I have scaled the height to 30 mm. I have printed the feet with Bambulab TPU and it has printed very well.
Feel free to scale the print to suit your needs.