... ,used in making machine 2.Pneumatic hole punch machine for plastic bags,plastic bags,leak hole Butterfly hole punchHole punching machine, standing specifications Φ2 ... ~ 10mm, used in making machine Pneumatic hole punch machine for plastic bags, plastic bags, leak hole, food bag hook holes and so on. PE ... washed off as a single-layer material thickness 0.02mm plastic bag, speed up to 280 times / min.