вот что нашлаTypes of Earring Clasps: http://www.overstock.com/guides/tips-on-different-types-of-earring-claspsView Earring Types and Backs (.PDF file) http://demandware.edgesuite.net/aaby_prd/on/demandware.static/Sites-jtv-Site/Sites-jtv-Library/default/v1320775699752/pdf/earrings_types_backs.pdfhttp://www.firemountaingems.com/earring_findings.asp?navsrc=2