SB46UA Electric Heavy duty coil binding machine CE,ETL Certification 4: 1 pitch Electric punching: 18000 sheets/hour Punch up to 25 sheets each time Punching A4, A5, B5 formats each time Punching larger than A4 formats by continuous punching Punching smaller than A4 formats by using 46 die disengagement pin Binding documents up to 500 sheets while use all sizes of coil from 4.5mm to 50mm Electric consuming: 120W