Bangles by John Moore Features Primary Material : aluminium Other Materials : galvanised steel spring and silicone Inside Diameter (mm) : 50, 55 and 60 One of a Kind : No Hallmarked : No Cleaning InstructionsDust and dirt can be removed from between discs using a long bristled, dry paint brush, taking care not to scratch the aluminium with the metal part of the brush. Try to avoid getting the bracelet wet but if necessary wash with hot soapy water and dry thoroughly with a towel and then a hair drier. Make sure no moisture remains beneath the silicone tubes and inside the spring, taking care not to over stretch it.