Thank you for viewing. This item was received from someone else and appears to have been used for handmade kumihimo (braided cords) as a hobby. It may be a bit more yellow than the images suggest (possibly silk thread). Some black is reflected in the package (image 5), but this is part of the bag. There are no labels or markings. I am not able to determine the condition or quality of the item. Please feel free to ask any questions in the comments, and I will do my best to investigate. It is highly likely that this is silk thread from Domyo, but there is no guarantee, so please purchase with that understanding. I am unable to make precise determinations of the specific specifications or materials. Please check the photos for the condition. Please forgive any oversights as this item has been stored at home.