When you use this .75mm brown Griffin bead cord, you'll be using 100% silk cord made from high-grade natural silk filament. Silk is the traditional stringing material used by beaders for centuries, prized for its soft, smooth nature. This cord has a twisted stainless steel needle at the end to save threading time. Doubling the thread is unnecessary, and the cord can be easily knotted because the thread has the correct twist. Each card has approximately 79 inches of silk cord.