Tungsten Ceramic bands are made through a modern adaptation of the ancient art of firing clay and stone materials to create pottery and other products. Crafted with genuine tungsten carbide and cobalt free metal. The ring is 8mm wide flat-top tungsten ring with black ceramic center that adds some elegance and style to the ring. Tungsten rings are scratch-resistant and amazingly durable, this tungsten carbide wedding band can serve you for decades. Tungsten bands cannot be resized after purchase. Note: Shipping takes 4 to 6 business days.