This is the NRS Boat Line 5/8-inch Polypropylene Rope Features: Tensile strength 2870 lbs. Sold by the foot or in spools of 200&';. Maximum continuous length sold by the foot: 200&';. Non-floating rope Not recommended for rescue rope Material: Polypropylene 5/8" braided polypropylene is resistant to rot, abrasion, mildew, petroleum products and most other chemicals. Not recommended for rescue lines. Non floating.