Dumor 331 A3 Paper Creasing And Perforating MachineDescriptionSpecificationsShipping The 331 provides a professional level of creasing and perforating, accepting sheets up to 900mm long and allowing up to 32 creases in a single pass, stock from 100 to 400GSM the 331 is an exceptional machine. Keyboard and LCD screen for job programming, capable of producing up to 2400 sheets per hour. Desk top Creasing and Perforating machine suitable for all paper stocks up to 400GSM Creasing eliminates the