GBC A20 Binding Machine Binder CombBindDescriptionSpecificationsShipping Bound documents give a positive first impression to your audience and lend an upscale, finished look to your work. The C20 binding machine uses CombBind spines to quickly punch and bind for professional looking results Binds up to 330 sheets Punches up to 20 sheets Use with CombBind spines 1 1 2 Inch maximum spine size Low force handle simplifies punching Works with letter, oversize and A4 documents Colour coded