5/16″ (8mm) New England HRC Prussic Cord by the Foot. Unique heat-resistant cover of blended Technora and spun Nomex. The Vectran core offers very high tensile and low stretch. Provides dramatically improved performance and safety. Lasts longer than traditional prusiks for improved efficiency. Technical Specifications: Average Tensile Strength 6500 pounds Wt/per 100 feet 3.2 pounds Diameter: 5/16″ (8mm)