Cufflinks by Sheila McDonald Features Primary Material : silver Other Materials : enamel and fine gold Fitting Type : chain Dimensions (mm) : 25 x 15 x 8 One of a Kind : No Metal : silver Hallmarked : Yes Cleaning InstructionsI recommend cleaning the silver areas with a silver cloth ( such as Goddards ) I would avoid using a liquid or cream cleaner as this might affect the enamel.