250 Foot White Braided String Line Core Only Strong and durable; the line has a tensile strength of 165 lbs. And braided property means it won't twist or tangle as easily; it is wound on a 1 inch diameter core and fits Stringliner Pro handles so you can easily switch out rolls of twine. Stringliner Mason’s Braided Line is durable and available in a wide range of bright, solid colours Quality #18 Nylon Line (tensile strength 165 lbs.)