The rope that made BlueWater famous, the II +Plus static is the standard for use in caving, rappelling, and rescue work. It's design of double twist cabled sheath strands as well as the double twist cabled core strands is truly the most unique and exacting rope design anywhere. These factors make it the best all around choice in a static/low elongation rope. Specs: Diameter: 3/8 inch (9.5 mm) Tensile Strength: 5490 lbf Working Load Limit (WLL): 396 lbf Weight Per 100 Feet: 4.5 lbs