The 4:1 12 inch 16mm plastic coil binding has a sheet capacity of 120 sheets and 1/2" thickness. It comes in 100 pieces per box.
Plastic coil binding (also known as Spiral Binding or Color Coil or Spiral Coil) allows a book to lie completely flat when opened cover to cover (360°). The multiple hole format makes the binding extra strong and the plastic coil's "memory" resists bending, making Spiralastic great for mailing!
