PEPPERLONELY Brand 10 Sets Silver Tone Brass Cabochon Frame Setting Tray with Round Glass Dome Tile Cabochon 18mm Quantity: 10 Sets Cabochons Settings: about 20mm in diameter, Tray: 18mm inner diameter Glass Cabochons: about 18mm in diameter, 4mm thick. Setting Made With Brass, Lead Free & Cadmium Free Paste the lovely pattern or put some tiny beads in the tray, then cover with the clear glass cabochon, a unique cabochon will be finished.