Bangles by Alena Asenbryl Features Primary Material : acrylic Other Materials : precious white metal Inside Diameter (mm) : 70 One of a Kind : No Hallmarked : No Cleaning InstructionsThe whole piece can be rinsed with soapy water and dried by patting with a cloth. If the fragments of metal tarnish they can be cleaned with silver dip, this will not damage the plastic in any way.