US Size 6 - 10 inches Or 4mm - 25cm 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® Aluminum Knitting Needles are made from a special heat-treated aluminum alloy to provide strength and durability, while remaining lightweight for comfortable stitching. Knitted stitches slide effortlessly on and off the smooth glass-like finish of Quicksilver Needles making knitting easier and more enjoyable. Quicksilver needles are packaged in blue vinyl reusable pouches.