EBayThe Nylon Mason Line is a high-strength, versatile tool designed specifically for construction, gardening, and DIY projects. Our #18 string is crafted from 100% premium nylon fibers, offering approximately 168 pounds of tensile strength. The tightly woven structure makes this line exceptionally durable, suited for various demanding construction environments. Whether you're ensuring precise leveling while laying bricks or setting up climbing supports for plants in your garden, this string line delivers outstanding straight-line accuracy. The mason line also includes a spool for easy winding and storage, ensuring convenience during use. The fluorescent dye enhances the line's visibility and ensures its color remains vibrant over time. The durability of the masonry line withstands repeated impacts from tools and resists knotting or twisting during stretching. This product is with any 4 to 6-inch spool handle, making reloading convenient. Each roll of construction string undergoes rigorous quality inspection to ensure an exceptional user experience. ■【High Strength and Durability】: Made from high-strength, premium nylon fibers with approximately 168 pounds of tensile strength, capable of withstanding high-pressure demands in construction and gardening. The tight weave enhances the line's strength and prevents knotting or twisting during use. ■【Precision Measurement】: Equipped with 5 built-in levels to help professionals quickly and accurately ensure the levelness of every brick or block, providing precise for construction projects. This string level line kit is an essential tool on construction sites. ■【Versatile Use】: Suitable not only for professional masons but also for gardening, hanging pictures, bundling items, and building plant supports, making it a valuable tool for home and outdoor activities. Strings provide stable in various scenarios. ■【Easy to use】: Ideal for use with string line level or for any commercial twine heavy duty outdoor projects; Use as plumb line, or with surveyors plumb bob with string, or with a masonry line holder; Otherwise, our Mason line is designed with a handle, which makes it easy to hold and use, and you can also easily reload the spool at any time ■【Bright colors】: Each braided masonry line roll is fluorescent and easy to see; Perfect outdoor string for use as landscape twine, property line markers, construction twine, or marker string; This string is perfect for use in the garden; Use it as tomato twine string to tie up tomato plants, or for watering african violets, or general landscaping twine ■【540 Feet Extra-Long Length】: Each spool provides 540 feet (approximately 164 meters) of line, making it ideal for various indoor and outdoor projects such as bricklaying, measuring, marking, and gardening, improving work efficiency.