GBC® CombBind® Binding Spines - 0.6" Diameter - 0.63" Maximum Capacity - 130 x Sheet Capacity - For Letter 8 1/2" x 11" Sheet - 19 x Rings - Ring Binder - Black - Plastic, Polyvinyl Chloride (PVC) - 25 / Box

The 19-ring binding spines bind up to 130 sheets of letter-size papers for neatly bound documents and presentations. Easy-to-use design allows you to add and remove pages with any comb-bind machine for quick edits. Rigid PVC plastic won't scratch, chip, peel or discolor. Standard, 5/8" diameter spines are compatible with GBC and other plastic comb-binding machines (sold separately).