This is brand new stock Cobb nylon bead cord. It is good quality white nylon bead cord with built-in fine needles attached to each cord. You get 4 cards. I'm told that each Card is over 60" long.
It says No. 80-06-6/c vintage new in package but some cards are yellowed because of this.
I think that nylon is stronger and stretches less. I learned from a jeweler pearl stringing on this. Worked perfect for us. The sizes run from 1/c that is small to 8/c which is the biggest of what i have.