Lifetime guarantee. Flexible Nylon Joins. These Circular Knitting Needles provide Lightweight comfort. There are 10 pairs of Addi Turbo needle tips, 3 blue cords, and 1 connector. The addi Turbo® Click Tips come in 10 different sizes (US 4 3.5mm, US 5 3.75mm, US 6 4.0mm, US 7 4.5mm, US 8 5.0mm, US 9 5.5mm, US 10 6.0mm,US 11 8.0mm, US 13 9.0mm, and US 15 10.0mm), three different lengths of our extremely pliable blue cord (24, 32 and 40 Inch), and one connector piece which helps to either store stitches or combine your cords. The Click tips require no tools to change; simply insert the cord deep into the tip, twist and release. The tips will remain secure until you change them, thanks to the Click’s revolutionary locking mechanism! The needles come in a wonderful wallet-like leather pouch that allows knitters to more conveniently travel with their sets.