Swingline® GBC® CombBind...
Communicate your ideas with professional polish.19-ring plastic spines wont scratch, chip, peel or discolor.Binds 11 x 8 1/2 documents.Perfect for internal reports and functional documents.Editing capability with a machine.Compatible with GBC and other plastic comb binding machines.To select correct diameter, measure thickness of material (including covers) and add 1/8.