Natural Emerald 18K Yellow Gold Interchangeable Vario Clasp.  The clasp measures 17.15mm X 14.1mm )  The vario cups are 18K yellow gold.The interchangeable clasp system is also called the Vario, Gellner and Jorg Heinz system.  This is shown on our cocoon cord. We sell them in our eBay store. The cord is not included in the price. 250-50-465