1TS152-800: Gudebrod Artificial Sinew 8 Ounce 900 Foot/300 Yards 5-Ply 70LB Test Strength - Natural - Sold by the Spool

Artificial sinew is a continuous filament, waxed polyester cord. Highly durable, ideal for stitching, wrapping, and stringing heavy or rough holed beads. Just like natural sinew, simulated sinew may be split down the middle to achieve a thinner diameter. 70 pound test strength.
Made in the USA!