ChiaoGoo Bamboo circular needles are available in six different cable lengths from 23 to 100 cm. They are made from Moso bamboo, which is the largest and strongest bamboo of over 1,000 different species. Sizes 2 mm - 3 mm have the same type of memory-free stainless steel cable as our RED/TWIST circular needles. Sizes 3.25 mm and up have SPIN nylon cable with spinning joints. The cable is transparent, soft and comfortable. The needle size is laser printed on each circular needle.