Most all spools have a tiny bit of thread used (but not all.)

  I've shown the threads from the top so one can get an idea of what has been used. 

 The spools are dusty and a few have surface spots (not deep) that will disappear soon after using.

  A great variety of colors.  

The two dark spools contain a thread that is  like nylon?

  One of these spools is black and the other is a dark brown. 

 Please see photos closely for more detail.

  I've thrown in the 4 sewing thread spools in as an extra.

**Ebay seller since 2002 -  buy with confidence**