These flat pad post earring findings have genuine, raw, unplated, titanium post with 304 grade stainless steel 4mm round flat pad and butterfly earring backs. Titanium is a lead, nickel and cadmium free, very strong metal. Great for those with metal allergies. The posts are 10mm long and the flat pad is 4mm in diameter. Easily glue just about any flat backed item to the pad to create unique earrings. Package of 25 pair!