The Faithfull Hi-Vis Nylon Brick Line is ideal for general bricklaying and marking out. Braided nylon line is strong and flexible with less stretch than other types of line. It resists fraying and is also useful for a plumb line as it does not spin around like conventional twisted cord. It is rot proof, waterproof, and resistant to mildew, dryness and heat.Fits the FAIBLDISPHD Brick Line Dispenser.