GBC(R) CombBind 19-Ring Plastic Binding Combs, 1/2in., 85-Sheet Capacity, Black, Box Of 100 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.