Product Description products specificationsnamesuction valve plastic oil packaging bagsthickness 0.02-0.22mm(as per your requirement)materials1 layerOPP,PVC,PE,HDPE,LDPE,PVA etc.2 layersBOPP/CPP, BOPP/VMCPP,PET/PE,NY/PE,etc 3 layersPET/AL/PE,PET/VMPET/PE,BOPP/AL/PE,PET/AL/CPP,BOPP/PET/PE,BOPP/PET/CPP,NY/VMPET/PE,etc.4..