Susan Bates Quicksilver Circular Knitting Needles. Quicksilver is a premium label from Susan Bates. Quicksilver needles are grey in color, a result of a special an iodization process which also makes Quicksilver slightly smoother and more durable than other aluminum needles. Quicksilver needles are packaged in blue vinyl reusable pouches. These 29 inch needles are available in sizes 1 to 19.