<p>Braided nylon mason’s line used in laying bricks should be nylon. It can withstand harsh weather while keeping its strength and durability.</p><p></p><p>HONGDA Brand, produces one of the strongest braided mason’s line available. The highly visible mason’s line is available with fluorescence yellow, fluorescence pink , fluorescence orange and the white .Bright colors ensure you can see this line in darker areas.</p><p></p><p>Mason String Line has a test strength of approx. 168 lbs.  a light-weight braided fiber that is very durable and offers a little stretch that can hold lines of up to 160 lbs. Nylon mason line is available in spools of 250, 500, or 1000 feet.</p><p></p><p>#18 Nylon Mason Line heavy duty mid-stretch twine that is perfect for a wide range of indoor and outdoor activities, including Crafting, Masonry, Gardening, Landscaping, DIY Projects and more. Braided Mason Line has excellent durability and does not fray or unravel.</p><p></p><p>#29 Mason Line Braided line does not unravel look at the quality of the braid. A loose braid will allow the line to sag and unravel easily, making it more difficult to use. A tight braid allows it to be pulled taut between block and line holders. This adds additional strength and gives you the straight line you need for laying your bricks or blocks faster and more efficiently.</p>