... with valve 4.best price ProductFoil coffee bag with valveApplicationCoffee bean,coffee power,milk powders ... ect.MateriaPET/AL/PEThicknesscustomizedSizecustomizedPrinting colorcustomizedBag typeSide gusset bag, back sealed bagOpen sideTop/bottomPricePrice is based ... in FuZhouProducing processPlate-making,printing, laminating, cutting,bag-making,examingFeatureStrong sealing strength; bonding strength and ...