Used by nurseries for tying plants to supports, our 4-Inch Plastic Coated Wire Twist Ties are made from centered steel wire encased in plastic to prevent rusting. They're Ideal for long term tying, taking twice as long to biodegrade as paper ties. They also have the flexibility to be loosened as plants grow and many nursery growers feel ties put less pressure on the plant vs. using a Plant Tie Machine. Sold by the box of 2000 or in cases of 50,000.