SUSAN BATES-Silvalume Double Point Knitting Needles. Silvalume needles have the broadest range within the Susan Bates family of knitting needles. Made of lightweight aluminum each Silvalume needle undergoes a special anodizing process that etches away all surface impurities. In addition each needle is heat treated for strength and durability and polished for a velvety smooth finish. These 7in needles come in packages of five and are available in US sizes 9 to 11: each sold separately. Comes in a variety of colors. The color is chosen at random and cannot be selected. Imported.