We have the skills that attaching air core inductor to the molded items and winding directory to the molded items. We can product coils with reasonable price by using multiple jigs.

We succeeded to product four straights aligned air core inductor.
It’s not allowed to use the mold lubricant, so we don’t use it at all when we wind the coils.

We possibly produce the slim rect. shaped air core indicator which needs difficult skill to make.