Do it Fluorescent Yellow Twisted Nylon Mason Line, 525 ft. is crafted from nylon, ensuring a strong and durable line for various construction and masonry tasks. Its twisted construction provides superior strength and resistance to rot, making it highly reliable for long-term use. This mason line is specially formulated with a coating that resists abrasion as well as oil, grease, gasoline, and mildew, enhancing its durability in tough environments. With a No. 18 thread size and a breaking strength of 170 pounds, it excellent performance and reliability. The fluorescent yellow color increases visibility on the job site, helping you work more efficiently. Packaged in a convenient sleeve, this mason line is ready for immediate use. Model Number: 338613