A replacement chain for use with EMF Harmony and Life Harmony Energies pendant necklaces:
The chain is adjustable between 18 and 20 inches with the included extender.
There is a small rubber ring that attaches the main chain to the extender. Ideally attach the clasp to one of the ends of the extender so that the rubber ring is an "interrupter". It helps improve the functionality slightly if there is not a ring of solid metal around the neck, although it is not crucial for the necklace to work properly.