Cufflinks by Sarah Packington Cufflinks made from a polished clear acrylic square section bar with scored dyed red lines. With a polished silver swivel fitting. Features Primary Material : acrylic Other Materials : sterling silver Fitting Type : hinged bar Dimensions (mm) : 20x15x15 One of a Kind : No Metal : silver Hallmarked : Yes Cleaning InstructionsClean with a 'silver cloth' or mild detergent and a soft cloth.