1.Air hole punching machine 2.Air holes / air bag butterfly hole punch for plastic ... type specification 25 * 6 * 9mm/30 * 6 * 9mm, used in making machine, etc. Air holes / air bag butterfly hole punch for plastic ... cards in the first, pearl film, drawbar, etc.. PE, PP, OPP, PO, PVC, PPE, CPE and other materials, products ...