OPP ( Cast Polypropylene) has excellent mechanical and optical properties such as, high clarity and gloss, heat sealable at low About Qingdao ... is very convenient. Our main products are opp bag, zip lock bag, pe bag, pp bag, pvc bag and so on. We have standard production ... ropes, or hanger hole5) Styles available: stand up, zipped, heat-sealed, heat-cut, cold-cut, blown, sealed-in the-middle, three- ...