Cufflinks by Carla Edwards Bright and cheery cufflinks to liven up those shirtsleeves! Handmade in Edinburgh by Carla. Features Primary Material : resin Other Materials : oxidised silver Fitting Type : hinged bar Dimensions (mm) : 18x18x5 One of a Kind : No Hallmarked : No Cleaning InstructionsClean items gently with warm water and a soft, old toothbrush, a little washing up liquid can be used if needed.Avoid contact with perfume, hair products, abrasive cleaning products etc. To keep pieces in top condition I recommend that items are stored in the box and acid free tissue they arrive in. It is not recommended that pieces are kept next to other jewellery items or in direct sunlight.