Braided Mason Line #18 Nylon Mason Line is a versatile, heavy-duty string designed for a wide range of indoor and outdoor applications, including gardening, DIY projects, fishing, boating, masonry, and crafts. Made of high-strength virgin nylon yarn, it offers superior durability and resistance to knotting and kinking, with a tensile strength of 160 lbs. and a diameter of 0.06 in. (1.52mm). It features a braided design that prevents unraveling when tied or cut, and comes with 10 built-in levels for precise measurement in construction projects. Easy to use with a convenient handle for holding and reloading, the fluorescent orange color makes it highly visible for use as landscape twine, property line markers, or general landscaping purposes. Material: Composite.