This 3D Model ist the missing part of my other model "sphere spiral d16mm" with a sphere diameter of 16mm.
link to sphere spiral d16mm:
The purpose of it is to symbolise two parts, that complement to one another like it should be in a harmonic partnership.
This part has to be made from flexible material if the sphere spiral is made from rigid material.
If you choose a rigid material be sure to buy the sphere sprial part in flexible material, otherwise you will not be able to assemble the parts.
To mount the filler part just screw it on the spiral.
The filler part snaps tightly into the spiral but with a needle like tool you can lift it and screw it off the spiral again.