Susan Bates Silvalume Circular Knitting Needles are crafted with fully anodized whisper smooth aluminum leading to a smooth join to a flexible cable. All needles are color coded for quick size selection. This set contains 3 circular needles in sizes U.S. 3 (3.25 mm), U.S. 4 (3.5 mm) and U.S. 5 (3.75 mm).