18″ Sterling Silver Waveform/Heartbeat Sensor Necklace. The Waveform shaped centrepiece is 7 x 19mm in size. It is attached to a 1mm Trace Chain. The necklace is 18 inches (45cm) in length and has an additional jump ring at 16 inches, allowing it to be worn at either length. It is fitted with a 5mm Bolt Ring Clasp.
