Swingline GBC 4200010 Plastic Binding, 1-1/2"Diameter, 330-Sht Cap, 100/BX, Black Sold as 100/Box. 19-ring plastic spines won't scratch, chip, peel or discolor. Binds 11 x 8 1/2 documents. Perfect for internal reports and functional documents. Editing capability with a machine.