Chiaogoo bamboo circulars have fantastic joins and pliable cables. They have a nickel-plated, copper join. Available in 30cm, 40cm and 100cm lengths. 30cm needles have 6.5cm tips. 40cm needles have 8.5-9cm tips. 100cm needles have 14cm tips. Sizes 2 mm through 3 mm have a memory-free cable. Sizes 3.25 mm and larger are crimped to guarantee no separation with a clear nylon cable AND they swivel! Size 15mm and 19mm are wood not bamboo.