All ChiaGoo patina, bamboo circulars have fantastic joins and pliable, clear, nylon cables. They have a nickel-plated, copper join. Sizes 3 (3.25 mm) and larger are crimped to guarantee no separation and they swivel! Sizes 0 (2 mm) through 2 (2.75 mm) have the same memory-free cable as ChaiGoo's RED circulars and TWIST cables! Needle size is permanently laser imprinted on each circular. Bamboo circulars are available in the patina color only. All size 17 (12.75 mm) and larger circulars are made of a lightweight wood joined by a clear, hollow, plastic tube. Needle size is permanently laser imprinted on each circular. Each tip is crimped for a secure connection.