You can use this tooling aftre printing to make your own FPV anti vibration rubber damper balls. You need only to fill the forms with silicon.
Production: Can be printed on FDM, SLA and DLP printers.
Files for different sizes included:M2x4.4x4.3mmM2x4.4x5.6mmM2x4.4x6.6mm
M3x4.4x4.3mmM3x4.4x6.6mmM3x4.4x8mm