Marshalltown's bright yellow masons line is twisted nylon which produces a sturdy and durable line. Once the line is created it is wound onto the cardboard core, the line is then "heat-set" to stabilize the line and further strengthen it. Marshalltown's mason line is not affected by mortar, oil, or mildew. 

The coloring provides high visibility meaning the line can be used in a number of conditions. Mason line is perfect for staking out sites, concrete and landscape layout, as well as brick and block laying.

• Twisted nylon line which produces a sturdy and durable line
• Heat-set to stabilize the line and further strengthen it
• Not affected by mortar, oil, or mildew
• Bright yellow coloring provides high visibility
• Perfect for staking out sites, concrete and landscape layout