SUSAN BATES-Silvalume 10in Knitting Needle Gift Set. 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. Each size is color coded so you can find the size you need at a glance. The knobs feature a no-roll design and the US and metric sizes are clearly printed on the knob. Each gift set contains three pair of needles in US sizes 11 (8mm), 13 (9mm) and 15 (10mm). Imported.