This professional-grade mason line features a #18 braided nylon construction with a diameter of 0.06 inches (1.52mm) that provides a tensile strength rated for approximately 160 pounds, making it suitable for demanding construction and landscaping applications. The fluorescent coloring ensures high visibility against various backgrounds including brick, stone, and soil surfaces during outdoor use. A braided design prevents unraveling when cut and resists kinking during deployment, maintaining straight alignment for precision layout work. The material's resistance to moisture, abrasion, and UV degradation allows for reliable performance in diverse weather conditions from direct sunlight to rain exposure. The nylon composition withstands contact with mortar, oils, and chemicals commonly encountered on job sites without deteriorating or losing strength. The line works effectively with string levels, chalk lines, and plumb bobs for establishing accurate horizontal and vertical references on construction projects.