Single or Double coils
For these toys to work, does it need to be 2 coiled up together? Is having one just as good or are they better doubled up? And what is the size of the internal coil.
The coils are connected together and are not easy to separate. The diameter of the inside of the coil is approximately 5 mm in diameter. It is 2.5” long.
Date published: 2018-08-03