Material: 33% nylon, 67% ester; Size: Thickness: Approx. 0.03 inches (0.8 mm), 98.8 ft (30 m)
Although it is a string, it looks like metal and is flexible yet firm so it is easy to tie it.
Thin enough to pass through small beads.
Crochet is easy to knit, perfect for accessories.
(From Amazon.co.jp)