... low temperature resistance 4.Back centered gusset bag 5.Moistureproof Center Back Sealed Aluminum Foil bags/Side Gusset ALuminum bag Specification ... designsSize(150+70*2)*470 or as per your requirementStyle Center back sealed bag with side gussets, the sealing seam is ... -side seal bag(with zipper or not), side-gusset bag, center seal bag, stand-up bag(with zipper or not) and ...