SGT KNOTS #18 Twisted Mason Nylon String Superior and Durable Twine for Masonry Jobs, DIY Projects, Crafting, Commercial, Workshop, Gardening, Trot Line Whether you're a professional bricklayer, a homeowner with a DIY project, or just need a handy all-purpose heavy-duty string to keep around, SGT KNOTS Twisted Nylon Mason Line #18 is here to do the job. With a test strength of approximately 160 lbs., this line is more than up to the job of holding a straight, sag-free line to keep your masonry straight and level, but that's just the beginning. Need an impromptu fishing line? A sturdy crafting twine? Give this twisted mason line a whirl, and it won't disappoint. Made from 100% nylon, SGT KNOTS Twisted Mason Line #18 is resistant to wear and abrasion, you can trowel away without fear, and use it it many other high-stress applications without a loss of performance. Also resistant to moisture, sunlight, acid, oils, and most other chemical wear, this line's versatility and durability in the face of a diverse array of circumstances is second to none. Currently available in: - White - Flourescent Orange - Flourescent Pink - Fluorescent Yellow This #18 twisted mason line comes on convenient spools of: 275, 550, and 1,100 feet. You'll always have plenty on hand, and it stores away just as easily as it deploys! Veteran Owned And Operated: - Just like the Marine Corps, SGT KNOTS is committed to be the best of the best. We continue to live by the motto, Semper Fidelis—Always Faithful. Our loyalty to our customers is what makes us who we are, and the reason we continue to grow in popularity and product offerings. We promise to maintain the strength and consistency of our products. We also pass down our bulk savings to our customers!