Use MARSHALLTOWN Mason's Line to create straight guiding lines to achieve the best level finish on all brick and stonework. This product is available in three distinct styles: Braided, Twisted, and Bonded Line. Braided Mason's Line isn't affected by extreme moisture or dryness and it won't unravel if struck by a Trowel. Both the Twisted and Bonded Mason's Line aren't affected by water, oil, mortar, or mildew. The Bonded variety offers greater durability, and the Twisted Nylon Mason's Line should be "heat-set" after winding to stabilize. All styles come in your choice of color, length, line size, and core size to suit your needs. Material: Plastic.