PEPPERLONELY Brand 20 Sets Brass Cabochon Frame Setting Connector with Round Glass Dome Tile Cabochon 6mm (1/4 Inch) Quantity: 20 Sets Connector Setting: about 15x7x3mm, Hole: 2mm, Tray: 6mm Glass Cabochon: 6mm in diameter, 2.5mm(Range: 2~3mm) thick.