Designed for use with our Corrugated Sprout Saver II Tree Wraps, our 12-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. Sold in boxes of 2000 or cases of 20,000.