Premium Material - Made of high-strength virgin nylon yarn, stronger than polypropylene thread, reliable and flexible, resistant to moisture, oil, corrosion, and weather conditions, providing you with long-lasting service time. | Durability - Braided mason's line has excellent durability, can withstand the hit of a trowel, will not tangle and kink stretch, and its durability makes it easy to use. The tight, consistent weave of the string will make for a premium, easy-to-use cord. Remember, the tighter the braid, the stronger the strands. | Nice Visibility -The fluorescent dyes we use on this twine offer excellent visibility and are ideal for any application that requires high visibility, won't fade easily and will quickly grab attention. | High Strength - Mason Line String with an approximate tensile strength of 130LBS, Nylon fibers are braided to create a mid-stretch line that can hold loads of up to 130LBS. Choose between pre-cut lengths of 250 feet, 500 feet, or 1500 feet. | Multiple Applications - Nylon Mason Line for Outdoors activities & Home use such as used every day by the professional brick mason, can give you a straight line for accuracy when laying bricks or blocks. Used for gardening to make climbing strings. Hanging picture frames, and bundling loose items for storage.