Cufflinks by Donna Barry Handmade in Edinburgh by Donna Barry.These subtle statement cufflinks are made from 100% recycled Sterling silver and are finished with a satin rippled patterned surface.Simple and perfect for any occasion. Features Primary Material : Eco silver Fitting Type : hinged bar Dimensions (mm) : 22 x 16 x 0.7 One of a Kind : No Metal : Sterling silver Hallmarked : Yes Cleaning InstructionsPlace silver in silver dip (avoiding the hinged finding) and leave for just a few seconds. Leave longer if badly tarnished. Then, rinse well with warm water. Using a soft toothbrush and fairy liquid, brush the silver all over. Rinse thoroughly and dry using a hair dryer. This will reduce any silver dp residue or water stain.Polish hinged finding with a silver polishing cloth.For a more Eco friendly method, place silver in a bowl with bicarbonate of soda, tin foil and hot water. dry with a hair dryer.