A3 350 Sheets Deli Comb Binding Machine: There are numerous methods for binding pages into a book, including comb binding. This technique uses a hole puncher that creates rectangular holes and round plastic spines with 19 or 21 rings. Format of Paper: A4 Punch 12 sheets is the maximum capacity. Fit for: A3, A4, and Type of Binder: Comb Type of Multiple Binder: Ring; Binding Capacity: