The C20 manual binding machine uses classic CombBind™ spines to firmly secure bound documents. Punches up to 20 and binds up to 330 sheets, with a 1 1/2” spine. Compatible with standard letter, oversize or A4 sheets. A color coded document and spine size guide are included. Manual. Binding Spine Type: Comb; Binding Sheet Capacity: 330; Punching Sheet Capacity: 20; Color(s): Black.