Do it Fluorescent Orange Twisted Nylon Mason Line, 525 ft. is crafted from nylon with a twisted construction that ensures superior durability and rot resistance. This mason line is designed to withstand harsh conditions, being resistant to oil, grease, gasoline, and mildew. It features a special coating that protects against abrasion, making it reliable for various construction and masonry tasks. With a No. 18 thread size and a strong 170 lb. breaking strength, this fluorescent orange line high visibility and toughness for precise and efficient work. The package includes one sleeve of 525 feet of high-quality twisted nylon line. Model Number: 338621