Addi Click Turbo Basic Interchangeable Circular Knitting Needle System with Exclusive Blue Cords 10 different sizes of addiClick Turbo tips (approx. US 4, 5, 6, 7, 8, 9, 10, 11, 13 and 15) 1 each 24, 32 and 40 pliable, blue nylon SOS Cords  for inserting lifelines as you knit 1 Click Connector, which helps to either store stitches or combine cords 1 addiGrip to make changing tips even easier and 1 addi Needle Gauge Liftime US Warranty included only on Blue Cord Edition