CombBind Standard Spines, 5/8 Diameter, 130 Sheet Capacity, Black, 100/Box
19-hole plastic spines bind 11 x 8 1/2 and oversized documents. Wont scratch, chip, peel or discolor. Compatible with GBC and other plastic comb binding machines. Editing capability with a machine. To select correct diameter, measure thickness of material (including covers) and add 1/8.